but yeah mono/mono has been a .NET Framework implementation (e.g. using the mscorlib from netfx) whereas dotnet/runtime/src/mono has been brought to be compatible with the .NET 5+ BCL for mobile purposes (i.e. One .NET)
i'm looking forward to the day when wine and mono aren't necessary anymore but realistically that day will never come.. at least, not in my lifetime xD so in the meantime, i will be appreciating the fact that they exist thoroughly
need runtime code execution, and that doesn't work with nativeaot. so i either write my own language, or use mono + ironpython to get python support with sandboxing
Swift has been moved out of Apple into the Swift Foundation though, but there's not really an apt comparison given that there's no real equivalent project at Apple