@jaraco I think the large # of jobs this introduces to setuptools' GitHub workflows is slowing down builds for other PyPA projects. There is a limit of 20 concurrent jobs org-wide for our plan, and setuptools has gone from 36 jobs in #3078 to 119 jobs here. I've noticed a significant backlog over at https://github.com/pypa/warehouse/actions over the last few days and suspect this might be why.

Any thoughts on how we could get this down to a more reasonable number of concurrent jobs per workflow run?

(cc @ewdurbin)

Originally posted by @di in #2923 (comment)