Stripe is using typed Ruby: they are authors of https://github.com/sorbet/sorbet

Also: lots of other big Ruby shops are on Sorbet, like Figma, One Medical, Gusto etc. We discussed this at the SF Ruby meetup after this talk https://www.rubyevents.org/talks/past-present-and-future-of-...

I have seen that. But on the smaller companies it’s been my experience that Typescript has universal uptake for the frontend while Sorbet and RBS are things to keep an eye on but not getting any interest in using yet.