I'd note that the nicer constructs you see in other languages were often based on people's experiences with C++. You can pretty clearly see some syntax and ideas copied into Java/C#, but it's true elsewhere as well. It's not surprising that newer languages learn from the past.
That said, almost all of those nicer variants do come with some added runtime costs. The general problem of making efficient generic code, without a bunch of boilerplate, and with a nice syntax, seems fairly difficult.
That said, almost all of those nicer variants do come with some added runtime costs. The general problem of making efficient generic code, without a bunch of boilerplate, and with a nice syntax, seems fairly difficult.