Haskell/Rust - Immediately
Java/C#/Go - Relatively quickly
Dynamic Languages - Whenever you decide it becomes important
Even though Clojure is not a statically typed language, it does have a type system.
Here's an example what Clojure.Spec lets you do. When I was working for a fintech company, we built a suite of specs for a ledger. Based on those specs we could generate data. And it wasn't just some set of key/value pairs with completely randomized numbers. It would generate "a proper" ledger, where every number in a transaction depends on other transactions.
We used that generated data to render UI locally and on the non-prod environments.
Using the same specs we build data validators, we re-used the specs to validate data in the input fields in the UI. Which is totally bonkers. How the heck you achieve code re-use between completely incompatible ecosystems - in our case, JVM and Javascript? Even Nodejs doesn't always let you re-use code between backend and the front. Clojure allows you.
Using the same specs, we've built property based/generative tests.
I've never experienced the joy of creating such robust, predictable, and reliable software with any other (statically typed or otherwise) language before.
I'm not saying you cannot build a similar thing (or even better) with Scala or Haskell (or some other PL). The simplicity of how Clojure allows you to write things like that - just incomparable.
> Even Nodejs doesn't always let you re-use code between backend and the front.
This is not true. Check out Lodash. It's a dependency of pretty much every FE and BE NPM package that exists. Ignoring rendering libraries like React, client side JS and backend JS are "just" JS.
> I've never experienced the joy of creating such robust, predictable, and reliable software with any other (statically typed or otherwise) language before.
I think you should definitely keep doing the things that bring you joy!
Respectfully, as someone who spent over a decade building front-end apps, I'd say: the code re-use between js in the browser and js in node still feels limited in comparison with Clojure/Clojurescript approach.
I'm not talking about utility libraries.
Code re-use is just one of the aspects. When choosing a tool, especially a tool like a programming language, one needs to take "a holistic approach". Clojure is not a silver bullet. Neither is Haskell, Rust, or any other PL.
I like Clojure today, because today it makes sense for me to use it. For the projects I build. I'm sure, someday, it stops making sense for me to use it, and I will move onto something else.
You can use all sorts of arguments for people to try something else today, assuming they are just misinformed - either about Clojure or the other PLs (you're preaching about).
I can assure you though, most Clojuristas I know - didn't end up using Clojure by accident. It's a deliberate choice. After trying many other options.
Though it's telling how little static checking by type systems is leveraged eg in LLVM, so even in closed systems the assurance payoff for static checking doesn't necessarily get good bang for the buck.
Eg working with web based services, your code tends to communicate a lot with other services, and a very large % of bugs that make it further out than your dev laptop come from those interfaces. Making these part of the closed world of the static type system is done in some places but most static language users elect not to do it, preferring programmable checks in form of schemas or tests. Which I think tells something.
I tend to think of static vs dynamic as a mindset question, where our bias of loss aversion rears its head. It's an attractive idea to hedge your risks by usign a static language even if it only catches the trivial bugs and slows you down, because statically found bugs are a falsifiable observation, wheras making programming easier, faster and more fun[1] in general doesn't leave hard evidence unless you run duplicate trial projects just for science.
[1] For some personalities, you might derive more fun and satisfaction in the mathematical certainty of static languages. Or you might be in a work environment where you don't have room to find fun anyway. Or maybe you don't even like programming. Yet others find fun indispensable: fun is necessary for keeping up morale.
Are you actually suggesting that "most static language users elect" to not decode at the boundaries of their system because it somehow is favorable to not do so? This does not match my perception of things, neither the "most are not decoding" part nor the "it's fine to not decode into a known good structure" part.
> It's an attractive idea to hedge your risks by usign a static language even if it only catches the trivial bugs and slows you down, because statically found bugs are a falsifiable observation, wheras making programming easier, faster and more fun[1] in general doesn't leave hard evidence unless you run duplicate trial projects just for science.
What an incredible straw man you've built up, but then you just let it sit there and don't even burn it up.
Since I'm not here to convince anyone, I can say your straw man is the opposite of my experience. I've never been able to prototype and change a system in any phase of its lifetime faster than I've been in Haskell. Haskell has downsides, but speed of development and maintenance is one of its strong points.
> I tend to think of static vs dynamic as a mindset question, where our bias of loss aversion rears its head.
Yup, and when it comes to fun, I've never had more fun programming that in Haskell, where I let the compiler check the annoying fiddly bits so my brain is free to tackle the meaty problems!
I'm was thinking protocol meta systems like protobufs where you use tooling to enforce closed world style communication patterns in a networked world.
By falsifiable I meant that it's an observation that could be shown to be false, if it was false. So a concept from philosophy of science, not an assertion.