Proxmox 9 was released, based on Debian 13 (Trixie), with some interesting new features.
Here are the highlights: https://pve.proxmox.com/wiki/Roadmap#Proxmox_VE_9.0
Upgrade from 8 to 9 readme: https://pve.proxmox.com/wiki/Upgrade_from_8_to_9
Known issues & breaking changes: https://pve.proxmox.com/wiki/Roadmap#9.0-known-issues
I tell myself that every time, but I mean, I still end up doing it every time anyway lmao
edit: Just did it, it went well.