[acemarke]

Flow appears to be _effectively_ dead outside of Facebook. Or at least plateaued, at a very low peak.

For actual metrics, the NPM stats of TS vs Flow downloads [0] show TS usage skyrocketing up to >33M DL/month, while Flow has never gotten past 2.5M.

Purely anecdotally, I see numerous articles talking about projects migrating away from Flow, and absolutely nothing about actually adopting Flow at this point. Even projects like Jest, which started inside Facebook, have switched to TS to get more outside contributions. At this point, the only major project I can immediately think of that's written in Flow is (ironically) React itself.

FWIW, I wrote a blog post recently about my own experience learning and using TS as both an app dev and a Redux maintainer [1].

[0] https://npm-stat.com/charts.html?package=typescript&package=...

[1] https://blog.isquaredsoftware.com/2019/11/blogged-answers-le...

[madeofpalk]

which is sad because I think Flow does things like error messages a lot better than Typescript.