[acdha]

I like TypeScript but I think there's a complexity threshold — if you have a massive collection of other people's code, types are essential. If you're building a basic web app which is using the built-in behaviour and have a reasonably modern editor + linter + test setup, type safety is still good but it buys you less than it does when your baseline complexity level is higher.

Since modern browsers and JavaScript give you a lot of functionality out of the box which people used to use libraries for, there are quite a few projects which are under that threshold.

[eropple]

For smaller projects, I find that the value is less the type safety (still valuable) and more the much stronger control of intellisense. Yeah, if you have a language server that's able to deal with typings your JS code will still be a lot better than without it, but starting with TypeScript just makes that way more fluid. I find that I write TypeScript much more quickly, and more correctly, than I do JavaScript, both for small and large projects.