Home assistant os in VM for everything vs another VM for other stuff

I have one server running type 1 hypervisor. I like that home assistant os has simple backups and lots of addons.

Would it be better to
1: have addons on home assistant os just for stuff that integrates with home assistant and have other stuff in another vm (for example casaos or similar running on linux)
or
2: install as many addons on home assistant os as possible, rest in another vm

Im talking about vaultwarden, sonnar, bittorent, media server and lots of other stuff…

Or leave homeassistant os configured with addons that integrate with home assistant and thats it?

Do you have any backup solution for another app like casaos? (i need similar backup implementation to one that already exists in home assistant os)

This (in my opinion)