A bunch of the AOSP apps feel like you have to rewrite them for modern standards now and then you can basically have them in maintenance mode for years. The AOSP messaging app has also lasted for 15+ (?) years and has basically had no maintenance from Google for many years.
Modernizing these apps seems very high-impact. These are the very first things a new user sees and after the initial modernization, they should be relatively cheap to maintain.
> Messaging, high impact.
Messaging can be replaced with one of the hundreds decent messaging apps.
Unlike the backup app which is utterly unusable, untrustworthy and frankly crap. And CANNOT be replaced by anything else.
As it stands it's impossible to have reliable backups in GOS.