[vallode]

I could not disagree more, but I am obviously open to it being a personal preference. I've spent months updating JavaScript codebases that are between 3 and 5 years old, most of them written with vanilla JavaScript. A _few_ of them were written with TypeScript at least partially and those files were the least mentally taxing to upgrade.

Some of the codebases had tests, a good chunk of which could (and were) eliminated simply by using TSC as part of the build process. I think allowing the compiler and tooling like prettier to make choices for you leaves more space for you to think about the problem, not the myriad of problems _around_ it.