Depends on what we are replacing. From what I have encountered: Akka was mostly used as Http server (akka-http). There is Http4s which can replace that and I t

Depends on what we are replacing. From what I have encountered: Akka was mostly used as Http server (akka-http). There is Http4s which can replace that and I think is great. Also its easy to use it with tagless final or zio's IO. Actors computation model depending on use case can be replaced with message brokers or Scala libraries. Like cats-effect or zio for composable concurrency primitives and fs2/zio-streams for stream computations. I know there are actor use cases beyond that, but I am yet to encounter project these days where picking akka would be my first choice. I have nothing against akka and I definitely enjoyed developing with it 5 years ago.