I use ext4 for my desktop and zfs for my media server. Ext4 is faster, ZFS is more accurate and less corruptable.

Yea.

Linux is just a kernel in the same sense that a disto is just a package manager and an init system. Technically that’s the case but colloquially a distro is any set of curated, pre-configured packages with an install script.

Beans on their beans.