I too learnt docker with casa, but in my case I think it made me learn slower. I think that if I learnt docker on cli or portainer only, i would have understood more quickly all the things docker. But i really agree with you about the day 1 functioning system, it’s what makes great for beginners I think.

Thanks for your answer, and for mentionning ZimaOS that i didn’t know, I’ll try to submit my issues to casaos’s github so maybe they get fixed one day, because I actually really believe this could become really great.