[loopingoptimism]

Adoption (especially in industry) takes time, but there's definitely interest in the Clojure and Scala communities.

The CHAMP data structure was already picked up by the ClojureScript community (https://github.com/bendyworks/lean-map), but still requires some work to be upstreamed to Clojure I guess.

I personally (I'm the author of the thesis linked above) plan to work together with the Scala folks at Lightbend for the collections overhaul that's planned for Scala 2.13 (see https://github.com/scala/collection-strawman).

[jabl]

Any idea about CHAMP and Haskell? IIRC the reception of HAMT was somewhat lukewarm back in the day, and AFAIK to this day the Haskell standard library doesn't use them.

[loopingoptimism]

I do not know well the current state of HAMT data structures in Haskell, but there is a related thread at the Haskell subreddit that you might be interested in: https://www.reddit.com/r/haskell/comments/6tmbju/efficient_i...