>The only things people don't like about it is that you need some tooling and a build step.

Wrong. Many people dislike many things about Typescript.

https://levelup.gitconnected.com/the-inevitable-decline-of-t...

https://medium.com/codex/why-are-javascript-pros-saying-good...

https://gomakethings.com/ditching-typescript-for-javascript/

https://www.reddit.com/r/sveltejs/comments/12cyady/are_you_l...

There are plenty more examples of why people tried typescript and went back to javascript. It's definitely not only because of a build step, but also "type gymnastics", and other code bloat.