I was (still am) a huge fan of fp-ts [1], which, in effect, was rolled into the Effect-TS ecosystem. And I'm still bummed TS+ [2] didn't work out, because I've never managed to love Effect-TS the way I loved fp-ts.

Maybe it's the lack of tacit function calling, the conventions, AI/modern-marketing push, or simply the daunting scope and scale (even more so with v4).

Still, despite my gripes, if you're willing to spend the time and effort, it's the safest and most elegant way to write TypeScript. Plus, it's now dependency-free, and the increasingly good LSP/editor support removes a lot of the friction that used to come with completions and diagnostics.

[1] https://github.com/gcanti/fp-ts [2] https://effect.website/blog/ts-plus-postmortem