My employer Datadog is devoting engineering time (not publicly announced yet) in Q4 for improving the Python packaging ecosystem and one such item is the PoC of this proposal.
This is explicitly outlined in the proposal and existing packages would be untouched, nothing would happen to them! The first line of the Specification section says:
Such reservations neither confer ownership nor grant special privileges to existing packages.
And then further down in the Uploads section as the very first upload prevention criteria it says:
- The package does not yet exist.