With an industry that moves so ridiculously fast, how do you know what'll be in use in the few years it'll take to become good at something?
I feel like if I'd learned web development five years ago I wouldn't know anything about it today.
I feel like if I'd learned web development five years ago I wouldn't know anything about it today.
This is a wrong assumption. Web development just gives the feeling of moving fast, it's not really the case. The foundation of web development is roughly the same as 5y ago. Most things from the http protocol, web servers, data storage, authentication, websockets etc. still works the same. Give or take a few UX and state-management tools and we're not that far into the future.
Also due to the huge investments in the web during the past decade(s) things should get slower because of legacy issues. Think fe. how long it's taking browser vendors to dump Flash or to adopt WebRTC.