RE ScyllaDB, there will absolutely be no fork and it’s very unlikely they have ever had a meaningful contribution to Scylla OSS (which is not changing, just going to bit rot and the enterprise version which was closed source was moved to source available). The reasoning being the bar is very high for contributions. It’s C++ 20/23 without virtual memory and a userland cooperative thread per core scheduler (this is the underlying seastar framework). The skills needed to do anything meaningful here is very high and I don’t see the motivation behind it as I would expect people having feature requests would be customers, have an easier time extending Cassandra or the feature would be available in the Enterprise version.