I had zero problems without swap-files for a long time, thinking that 16gb was a lot of ram, and that i could manage. it wasn't and i couldn't.

Now I run two swap partitions the size of physical memory on all machines. Turns out that after some weeks a good third of allocated ram lives in swap proving its usefulness .. and that its quick to turn the aux-swap partition into one for lvm snapshots and i suppose to act as part of the set to emulate'baloon files' too.

tl;dr; bad defaults. go with the size of physical ram and get suspend/hibernate/hybrid working and tested too.

use a 2nd ram-sized partition for snapshots/lvm and emergency space/lvm|zfs.