If we’re updating PEP 11, I feel we should add lower bounds also for the versions of the supported platforms. For example minimum versions for glibc, macOS (c.f. this discussion) or windows, which probably closely correspond to whatever’s being tested in CI regularly.
For example, I doubt that anyone would consider CentOS 6 with glibc 2.12 from 2010 (EOL in 2020) still supported. Windows <10 (or <7 or <8) might also be bitrotting fast. That sort of thing