Remember when distros used complicated partition setups, one for /root, one for /var one for /home, a swap partition etc. Was always a bad choice because one of them would be at 99% while others would linger below 10%

For swap, the best advice is to disable swap on your desktop, unless <8GB RAM. Really, I've never needed it and you probably won't either.

Id always suggest at least 2-4G of swap even if you have plenty of memory 32g+ because for that rare edge case where you'd really not want to OOM.

Agreed. Buy more RAM but these days that means taking a HELOC