Yeah I get your thing with LXD and Canonical. I’ve been moving a ton of clusters to Incus because of the obvious reasons and I’m happy with it, obviously the fact that the original people who made LXD on Canonical are now working on Incus is a big plus.
Regarding the Proxmox kernel you can read this: pve.proxmox.com/wiki/Proxmox_VE_Kernel but frankly if you search the web for “proxmox kernel bug” what you’ll find are tons of different issues on almost every version. Another thing that I really hate about Proxmox is the startup, the amount of daemons and scripts they run to make the thing work.