Castle Game Engine Roadmap
castle-engine.io
castle-engine.io
It goes back to 2007. Pascal was taught in schools as the main programming language in the 80s like python and java are today.
My quick observation is that Nakama does seem to have more complete docs and wider support ( https://heroiclabs.com/docs/index.html , https://heroiclabs.com/customers/ ) -- which is super-important for us (Castle Game Engine authors). Anyhow, I'll learn more before making the decision with which to integrate :)
Otherwise you are completely blind as to how the systems really work.