OTOH it is a LTS release. Maybe the known stability of R 3.6.3 is better?
I don't have an opinion either way. If someone thinks it would be of
benefit of Ubuntu users, then I'm happy to help make it happen.
I am not sure I am familiar enough with Ubuntu innards to leads the effort
there.
For the FFe bug, it's more a case of convincing Ubuntu's release team
of the benefits, and allaying any concerns they might have.
I would follow-up on that bug and say that I'll take care of managing
the transition; uploads, autopkgtests, etc.
Regards
Graham