I use a Yunohost for more about 1,5 year. I love for stability and simplicity but also openess for more pro users. I have my own backup solution that works great. Yunohost isn’t popular but has big catalogue. Some of the apps are not present in catalogue, so I use Docker on second device to get them.
Yunohost is creating backups for apps that are being updated. If update fails, it automatically reverts. Yes, it works, I checked.
Yunohost is here for years now, and it does not look like it will be abondoned any time soon.