3.6 is pretty much universally available at this point.
MacOS Sonoma (the latest version) doesn't include Python at all; older versions of MacOS which are still supported ship with Python 2.x
> I don't think
> target audience
You != people
Then address this to the owners of those machines. And get a load of cash ready to give it to them, so they could migrate to somehitng newer.
I know of a couple large organizations that have tens of thousands of RHEL 7 machines that use letsencrypt for customer websites, and I sent this project to sysadmins on their teams, so it's very realistic to expect that businesses are still using supported software.
Not everyone can just upgrade to the latest version of Ubuntu every 6 months for their production workloads like you might expect.