I think a lot of it is that modern languages (python to some extent, rust Julia etc) implimented many more of their features themselves. Julia, for example, ha

I think a lot of it is that modern languages (python to some extent, rust Julia etc) implimented many more of their features themselves. Julia, for example, has some basic stuff defined in C, but 70% of the code is just Julia. Since most of the changes between releases are in the language, they don't introduce new syntax or make the language feel messier. They just slightly expand what the language can do easily.