Mauro Carvalho Chehab [off-list ref] writes:

So, I'm proposing to change the minimal requirements to:
	- Sphinx 3.4.3;
	- Python 3.9

By setting Sphinx minimal version to 3.4.3, we can get rid of all
Sphinx backward-compatible code.

That's certainly a nice thought.

With regard to Python ... are all reasonable distributions at 3.9 at
least?  CentOS 9 seems to be there, and Debian beyond it.  So probably
that is a reasonable floor to set?

jon