I have been using ReScript for (almost) a year as a production programming language. There were a few limitations and confusions at first, (and I don't think it will be replacing TypeScript in any near future) but I can't even think about going back to a work environment uses TypeScript, the dev experience is so good :)
I think ReScript community is pretty active right now, I have big expectations about future 10.x releases (I'm working for a company uses ReScript as a main programming language) there are less buzz recently though.