I have a Phone with a click-in latch and nothing wore our over the last 5 years

I have an old midi-tower standing around with everything inside but drives.

Is it stupid to just set up the drives as zfs inside the case and let my docker services run on the same machine (as long as there is enough RAM etc. of course)?

Or should I get another PC as application server?

If this is the thing I heard of a few days ago then google had multiple backups on different sites but they managed to delete all of them

I get what you mean. I just cant wrap my head around how many people buy windows without even realizing it and think they get it for free or some stuff

I mean you pay for Windows on preinstalled computers, too. There are Laptops sold without OS and they are cheaper than the same model with windows installed.