Proposal: close old feature-request issues (Language summit follow up)

[brettcannon]

@AA-Turner

I’m not sure, for instance, if I can close issues for platforms unsupported per PEP 11 currently, or for EOL versions of Python – this would cut down the backlog significantly (at least a couple of hundred issues, if not 4 figures).

I have opened Should we close issues for platforms not covered by PEP 11 or under active development? to discuss this.