Just a quick note that piggz’ 4.1 is working quiet well on Volla (and GS290) … I went (I believe he did too) with, install clean VollaOS 9, upgrade to 10 and then download the artifact at: run-build-lvm-devel (#1579744269) · Jobs · sailfishos-porters-ci / yggdrasil-ci · GitLab …
Unzip that, run the flash script. Worked great.
I can finally do proper testing of aarch64 AND with SFOS 4.x
EDIT: Restore from backup didn’t get all the way through (People contacts were not imported)… but almost 
Since it’s never worked entirely for me, I wasn’t that hopeful 
It did, also, after successfully importing gallery ‘freeze’. I had to hard boot the device.
EDIT2: Stability wise, everything is great. I did have to update from the devel repos but piggz has been fixing stuff constantly. thumbs up.
EDIT3: Like everyone else whose running 64bit I’ve now realized how many apps are no longer available … sigh.