But wouldn't factoring out the obsolete features limit the libraries that are available to use? I thought that was the point of the newly developed systems lang

But wouldn't factoring out the obsolete features limit the libraries that are available to use? I thought that was the point of the newly developed systems languages. Even if you follow some "sane" parts of the language, the rest of the ecosystem won't agree with you. Just look at this thread, there are tons of disagreements in what a good C++ code is.