C# generics are way more powerful than that when it comes to writing high-performance or just very, err, generic code. Generic constraints and static interface members are immensely useful - you can have a constraint that lets you write ‘T.Parse(text[2..8])’.

They are far closer to Rust in some areas (definitely not in type inference sadly, but F# is a different story) than it seems.

Of course if one declares that they are an expert in a dozen of languages, most of which have poorly expressive type systems, the final product will end up not taking advantage of having proper generics.