[notacoward]

These seem to be the four features everyone's talking about: coroutines, modules, concepts, and ranges. Of these, modules and concepts are mostly being praised not so much for adding anything as for removing pain points - super slow compilation in the case of modules and super awful error messages in the case of concepts. Along with ranges, these merely increase parity with other languages that never had these gaps/warts to begin with. The only one of the four that seems like a feature rather than a bug fix is coroutines.

So yay, these are improvements, and welcome just like improvements to any legacy system always are. Kudos to the "maintenance programmers" of language design.