Ah, that would be bliss.

I thought at least open source ones would do it otherwise considering the freedom they represent.

Looks like it has not reached that point yet.

Suppose I want to keep a backup and decide later what I want to discard, I will have to keep on doing it manually each time to update the archive.

WhatsApp did it properly before where I could easily backup the whole directory which included all media and chat database locally. But now they are forcing Google backups which I do not like. I was looking for alternatives but they all seem to need this kind of manual saves. Eg. Signal, Twin Me, and the recently tried Jami.

I believe it is still better due to raw material availability?

I sincerely hoped Jolla would at least continue to make one technology demonstrator hardware model available for purchase by enthusiasts. The current situation where I have to buy a phone and then buy OS separately is not feasible for me.