I’m surprised TypeScript is controversial to some people. Having worked on a large vanilla JavaScript framework, the benefits were pretty clear.

Many of us don't encounter the sort of problems Typescript offers to solve. As most programming languages, most of the bugs I create when using JS is logic bugs, and those are solves by unit testing, not "more types". It was a long time ago I managed to push broken frontend code because of assuming the wrong types, so personally I don't find TS that valuable. But obviously others seem severely impacted by those types of issues, otherwise TS wouldn't be so popular in the first place. People be different :shrug:

Myself and this post are also pro-TypeScript!