I'm "in it" now, so I'm not going back. But transitioning from just Docker-in-Debian to everything-in-Proxmox is not without its drawbacks.
There's this new element of chasing down bottlenecks & trying to figure out how to address them.
VMs take ownership of stuff in ways that make sharing with other VMs/LXCs challenging.
Attaching storage to VMs vs LXCs have their own unique intricacies that it's taking me awhile to wrap my head around. Throw in USB3 HDD enclosures and it's extra-fun.
But, I'm getting there...