There are much more of it. I think around 1/3 of standard library is legacy and burden for python. I recall there was a PyCon talk about why you may not want to

There are much more of it. I think around 1/3 of standard library is legacy and burden for python. I recall there was a PyCon talk about why you may not want to be a part of standard library. Release process and support of old versions is very strict and heavy, it could delay releases and API change dramatically. You can look at situation with urllib for example, there are 3 versions of them, but most popular is requests 3rd party module.