I don't know what to think about it. Half-baked idea: use free functions only in one file in project is meh..

Modern Kotlin, Scala, F# can and use free functions and reduce boilerplates to minimum. C# developers wants attract newbies, juniors, fans of J's, python etc and simultaneously don't disturb old users, fans of c#/java and enterprise development.

"It's only for quick scripts, prototyping, for teaching". Choose a side, don't pretend that you are modern and cool.

Modern c# is fine, but some features are only sugar, and yet i still waiting for proper sum types with exhausting pattern matching. Slow progressing java have this in 17 version..