UdoB, While I will wait some days (probably until the "real" release) this is interesting:
"We are pleased to announce the first beta release of Proxmox Virtual Environment 8.0! The 8.x family is based on the great Debian 12 "Bookworm" and comes with a 6.2 kernel, QEMU 8.0.2, LXC 5.0.2, OpenZFS 2.1.11.":
https://forum.proxmox.com/threads/proxmox-ve-8-0-beta-released.128676/