I spent a fair amount of time doing a POC on Orleans but ultimately went with SF Reliable Actors due to some issues I couldn't resolve with a custom Streams implementation (Kafka subscriber/publisher).
I really enjoyed the simplistic development model of Orleans compared to SF, and I want to give streams a second chance on a personal project, but I'm concerned that both Orleans and SF RA will be superseded by SF Mesh - do you have any thoughts on this?