For those of you trying to move off #unity, if #godot's weak C# is a deal-breaker, check out #Stride. I've only just started trying it out, but so far it's very promising. It's tightly linked with .NET, so the dev-env is Windows only, but the output is multiplatform, and the integration with C# is outstanding.

It's also got an editor layout and general scene framework that are very similar to unity, which makes transitioning easier.