Damien Cassou wrote:
> Why don't you switch to 3.9 or 3.10?

Reasons that have to do with reality outside universities:

1) a lot of people still use 3.8 so I continue to try to maintain it. I 
think that is called support.

2) in projects with a tight schedule you usually don't have time to port 
to the latest greatest, especially when your current version works just 
fine.

Additional reason:
3) Sophie is stuck with Tweak which is stuck on 3.8

Michael