It’s always nice to have a failsafe if some process has a major memory leak. Otherwise if your memory fills up your system completely freezes with no way to recover.

You can simply use a DNS provider like Cloudflare DNS along with ddclient

For real, saves so much space that would be used for VM backups.

Aside from that, I have anything important backed up to my NAS, and Duplicati backs up from there to Backblaze B2.

Nice