partitions are used for organizing, the downside is that more partitions make each one smaller
I end up running 1 btrfs partition sagred between all my installed Linux distros on one system
lvm is also awesome for resizing and moving partitions
my desktop right now has nvme0n1p1 as my efi partition and p2 as a lvm pv
inside that lvm I put everything else as it's very easy to resize and move them (I also have p2 encrypted with luks2)
here's a tip if you only have one alarm you're less likely to sleep thru multiple alarms