I have been using casaos and sincerely it is great as a simple solution to avoid some hassles. On the other hand if you are already handling those things yourself and are fine with it, it might have less value.

I am considering some changes and now I am finding out that maybe having a backup of the configuration to set it up again later is not something I can get in casaos.

Is ZimaOS even worth considering if is not Open Source?

For me personally this is a key aspect. I would avoid any proprietary solution, or you will be left in a position where you have no control of your data. I definitely won’t be checking zimaOS.

Instead I want to check and maybe try yunohost or freedombox.