if i use btrfs subvolumes, does it mean that i can have one EFI partition and one root partition, and then subdivide the root partition using subvolumes?
Yes.
how would that work during the installation process? or is it done after installation?
That depends on your distro. What do you plan to achieve with the separate subvolumes?
Nah, when I was on vacation there I was always allowed to drive my normal winter tires. On some mountain passes e.g. chains were mandatory though, and for good reason.
Bullshit. Yes, we open doors and check all rooms for people and danger but if you’re there with keys we’ll use those. Of course we use those, where did you even get that idea.
Nah, not everywhere. Our village has no water meters because, why. Spring water from the mountains is not treated, only monitored for microorganisms and contaminants and fed into our water supply by gravity. Doesn’t really matter if it runs through a computer on its way to the sea or not.
In places like big cities or flat plains where the water needs to be pumped and treated that’s a different thing.
Server hardware with their 15000rpm fans will do that. We have a customer specializing in GPU intensive number crunching. They have little storage cupboards accessible from the hallway for every two person office. Their workstations sit there and the cables go through the wall to the desks.