Pozdě ale přece, mám přímo za saty (profi řešení, ne jen hobík). Pokud je zájem do budoucna, dej v SZ Signal handle a spojím Vás. Taveným plastům zdar!
(Below is hastily written - from my past experience, the feeling from transition. No hate, I'm grateful for the project.)
Balancing the mixture of the Google vs nonGoogle parts.
The Private Space is lifesaver in case one needs to have also Google Play or any other Google service because some apps cannot be handled well enough in pure GOS. Back then relative novelty compared to traditional profile switching.
Also battery life suffers when apps need the Firebase and there is none. So notifications and ability to be on reach. Signal for example still doesn't work well (mainly the calls).
Finding alternatives for the apps outside of the GPlay. Not only putting them into Obtainium but also solving what solution should I choose from the 4 alternatives. New UI, new bugs and unexpected behavior.
Repeated data migration. Setting up the storage scopes. No available camera SW, so only usable is the Camera from Google. (And the Google Photos being hardcoded in the preview so Immich can't be invoked from the camera app.) Backing up the files - Syncthing, LocalSend, Immich for photos, Proton Drive - what else? Keeping in mind what is backed-up to where by what and how often and is it reliable? Failing many times because of Battery restrictions or being killed from the background running Active apps.
There is possibly no comprehensive guide nor a list of apps to solve the common problems. Also because all is from one center (Google) and must be redistributed (to the apps).
The switch in ownership of an apps - like SimpleMobileTools vs Fossify.
.apk in general, the beta vs stable, the repos, for the Proton is not easy to find them all.
Nuances such as GPlay version of .apk vs for f-droid repos.
Verification of the .apk and how to do that.
The Privacy (GOS does not address much) vs Security (GOS main target).
Finding out the backup in the GOS is not reliable and often doesn't work, therefore can't be used to almost 1:1 copy to a new phone.
For reasons if something should stay connected it does need to be permanently in the notification area? Especially the nostr apps (Amber, Citrine, Pokey) - add Signal, Meshcore, BitChat and alike, for example. They pop up all the time back in the notification after being pushed out. Sometimes, seems to me, apps failing work properly if they are not present there. So the entire notification is still heavily occupied.
The distinction between Active apps (and how to achieve they stay alive) and the notification area. It's misleading. And in case of low-RAM device, any ram hungry app will kill the apps from Active apps (always the case with the Camera).
Janky eSIM activation. Play integrity api used?
No decent keyboard before the FUTO one.
No good call filtering (only working solution if the one from Google) available to fight spam and unwanted calls.