There's probably no need for Typescript in simple projects that are less than a few hundred lines of code, but the immense spider web of dependencies this blog features becomes unmaintainable if you don't use proper type validation. Remembering what properties are in what objects in a Rube Goldberg machine like this are simply impossible.

I appreciate languages like Javascript, PHP and Python for their ease of use, but I don't think they're well suited for any complex project.

I used to get annoyed by TypeScript too when I first started using it—I felt like it was slowing me down and making me unproductive. But this is only because I tried to use TypeScript without really understanding how to use it effectively (which will make you unproductive with _any_ tool).

Once you work long enough with TypeScript, going back to pure JavaScript feels like hell.

After using it for five years I can confidently say I was wrong.

I wouldn't even consider working for a company still using regular Javascript.