I am new to Incus, but not LXC. I personally would trust Incus to do the same stuff, the biggest advantage of Proxmox is their Proxmox Backup Server.
On the Network side they have “SDN” if you are using VLAN, its all done via GUI.
Also Ceph is well and easy setup same for ZFS.
BTRFS is experimental as of now. Experimental means it works, but you have to go for the CLI and some features maybe missing like replication but I don’t know the exact state.
Why not just go with Incus?