I still use it. They finally fixed my biggest complaint about it a year ago, which is that you couldn't use vanilla Clojure lambdas for the Java functional interface, and so you'd have to reify that interface and it was bulky and ugly. Now it works fine so long as the interfaces actually have the @FunctionalInterface attribute.

Not every project uses @FunctionalInterface, but I've been trying to add it to places [1] [2] [3], and now I'm able to use Clojure in a lot more places.

[1] https://github.com/LMAX-Exchange/disruptor/pull/492

[2] https://github.com/apache/kafka/pull/19234

[3] https://github.com/apache/kafka/pull/19366