Updating sphinx?

Hi,
I've noticed that the sphinx in ports is *really*
old and hasn't been updated for quite sometime.

I understand that its got a huge amount of reverse dependencies
and can't just be updated at will, but I was wondering if it might
be possible to add something like py-sphinx3 which is a different
package and then is possible start shifting packages?

I am trying to see if I should do this if there's any interest or if
people would prefer to do it some different way?
Quite some packages would be upgradable if sphinx is updated.

Best,
Aisha