If loading GitHub website is a technical problem, then it is a pre-existing condition not caused by PEP 581.

On Sat, Jun 29, 2019, 12:47 AM Steven D'Aprano <steve@pearwood.info> wrote:
You have missed at least one: the minimum technology requirement for
using Github is a lot more stringent than for Roundup. Github's minimum
system requirements are higher, and it doesn't degrade as well, so
moving to Github will make it much harder for those who are using older
technology. If not exclude them altogether.

I'd submit a PR for this except, well, see above...