I'm intrigued, as your recent comment history keeps taking aim at Proxmox. What did you find questionable about them? My servers boot just fine, and I haven't had any failures.
I'm not uninterested in genuinely better alternatives, but I don't have a compelling reason to go to the level of effort required to replace Proxmox.
OK, I can definitely see how your professional experiences as described would lead to this amount of distrust. I work in data centres myself, so I have plenty of war stories of my own about some of the crap we've been forced to work with.
But, for my self-hosted needs, Proxmox has been an absolute boon for me (I moved to it from a pure RasPi/Docker setup about a year ago).
I'm interested in having a play with LXD/Incus, but that'll mean either finding a spare server to try it on, or unpicking a Proxmox node to do it. The former requires investment, and the latter is pretty much a one-way decision (at least, not an easy one to rollback from).
Something I need to ponder...