Comment by Royalaid

Cognitect, the company that shepherds and maintains Clojure, has joined Nubank (https://cognitect.com/blog/2020/07/23/Cognitect-Joins-Nubank) and so they are starting to flesh and grow the core team as well as fund some of the open source projects/devs that the ecosystem relies on (https://cognitect.com/blog/2020/12/15/sponsoring-open-source...).

Add to this a lot of people are changing jobs and pushing for using more alternative languages or exploring new languages and as a result many people are building in what they want instead of what they are forced to use at work. The sibling comment about roam is a good example as they have had a lot of press lately.