A server backup is useless if you can’t decrypt it and it’s very easy to accidentally lose the keys for end-to-end decryption. I too have lost my Signal history by migrating to a new phone incorrectly.
Without some easy to use out-of-band key backup solution, an E2EE server backup is no backup at all.
> After losing my phone and not having a way to recover a lot of data, I've come to the realization that I don't want end to end encryption.
Effective backups and key management are 100% related to this thread
If you have an Android device you can literally backup your Signal message history and move it wherever you want.
I think Windows has an unofficial option. But yea you're out of luck on macOS and iOS it seems.