[nkassis]

I think (and have seen from personal experience) that some of those groups are more just individual teams that have adopted clojure on their own but are relatively niche and isolated from the larger companies. I don't think it's mostly made up of acquisitions. Teams in some large tech companies are free to choose the language that best fits their needs and so you can find pockets of clojure, go, etc ... around. Also the ones I've had personal experience with were all backend teams. I think clojurescript is still lagging backend clojure in tech companies but all I have is anecdotal evidence.