default-installation

I just completed a fresh install, and I'm wondering, as I go through all of the typical system configs and updates that we usually do, if there's any breakage issues with going straight to Bullseye now considering it's so close to release anyway? Is anyone here running Bullseye in prod instead...

According to the documentation I've read and searched for, ext3 is supposedly the default filesystem for proxmox installations. However on installing 4.4-1, it seems that it actually uses ext4. Filesystem Type 1K-blocks Used Available Use% Mounted on udev devtmpfs 10240...