I’d suggest looking in to it farther. The commenter above basically covered it, but no, beeper is not all closed source. Their hosted server has never been open source, but all the self-hosted bridges have been, and continue to be. You can run your own, open source, self-hosted beeper server, just like you’ve always been able to. There’s nothing embrace, extend extinguish about that.

Where did you read that? The github pages are all still open and receiving updates, you can still self-host the bridges and its under the apache-2.0 license, just like it’s always been.

Sadly it doesn’t 🥲. Copying app data is the hardest part of the process without a system level backup like seedvault, neobackup or traditional google backup services.

Only if you’re currently running stock android.

NeoBackup is the only one I’ve run across that seems to really fill the role of backup and restore thoroughly. The trouble is, in order to work it needs root, so I’ve never actually been able to try it. Almost reason enough to root in my book 😅, I love a good back up system.

Seedvault is another fairly well developed option, but it needs to be hardcoded in to the OS by the ROM developer.

You’ll probably benefit from a series of different backup apps in combination. Here’s a few that I’ve used and benefited from:

SMS import/export - backs up all SMS, MMS, call logs and contacts. Does not backup RCS.

Applist backup - back up your installed app list. This includes data on where you installed the app from and where you can get it again along with other useful info. The apps still have to manually installed.

Aside from those two, most FOSS apps include a backup and restore function, such as: signal, neo launcher, fossify calendar, newpipe, metro (music player), aegis (2 factor), obtainium, etc…

I hope this helps. I tend to tinker and install various ROMs, so am well aquainted with the pain of setting up a fresh OS without a system wide backup program. Its not as bad as it seems though, and as long as you get your messages, contacts and call logs moved over it goes pretty smooth.