You're right, Erlang still has an important feature that (almost?) all other languages lack: preemption. I think the actor model is great, but is crippled if required to use cooperative multi-tasking (like Akka); the code starts simple and then becomes increasingly tangled and complicated. I just think that the Erlang ecosystem has stagnated and the language itself feels dated. If/when the JVM or maybe Rust gets preemption, l think it would be best if all moved on to an actor system built on a more performant, robust, and expressive ecosystem.