On 10/20/20 10:45 PM, Paul Sokolovsky wrote:
One problem with this PEP, which I didn't see mentioned in the other
replies, is that it tries to grab "?" character, which is already
sought-for by another pending PEP: "PEP 505 -- None-aware operators",
https://www.python.org/dev/peps/pep-0505/ .

I don't think PEP 505 is much of a concern.  It's from 2015, and it's marked "Deferred".  I suspect if it was going to happen it would have happened by now.