If you really want better sleep quality probably a better way is stop using stuff with screens like an hour or so before bed. It’s not really the blue light that is the issue, it’s the endless content keeping our mind active.
Give your brain time to rest and relax!
Sure:
Proxmox backs up all my VMs/CTs nightly to the proxmox backup server I run as a VM with an external HDD attached to it. This keeps around 30 versions with a retention policy so I can go back pretty far if needed. These are full bootable images and include everything.
Restic (using Backrest to manage it), runs on any VMs/CTs with critical data, and backs up to Backblaze B2 every night as well, this is a more limited choice of the critical files that I’d need. Similar retention policy as the proxmox backup.
With both I try and do some full restores every month or two and test things out.