What would that entail, just a package whitelist? A few renamed packages? In the python 3 transition they renamed urllib2 to just urllib, but now it's almost a dead battery too and you want to use requests.

Python had enough fun with 2 to 3 transition I think.

Broadly speaking, maintaining a big std lib is a huge amount of work, so it makes sense that a language team is conservative about adding new surface to a stb lib which they will then have to maintain for a long time.