Proxmox migration assumptions are the part of the VMware exit that doesn't appear on any migration checklist — and the part that causes the most damage after go-live.
The migration succeeded. Six weeks later, a storage event occurred. The runbook assumed vSphere behavior. Proxmox behaved correctly. The runbook didn't. That's when the migration actually started.
That team wasn't unlucky. They were carrying assumptions nobody audited.
Proxmox isn't replacing VMware. It's replacing assumptions — and most organizations don't know which ones they're carrying until the environment stress-tests them.
What Proxmox Actually Replaces
