I mostly agree, but I think it will be a slowly death as VMware has a big footprint on the enterprise space like IBM/Cisco and the big business inertia to change will keep it afloat for let's say 10/15 years or something. I got Proxmox on my homelab and gets the job done, I prefer it over vsphere stuff any day. But there are drivers/features in VMware (NIC SR-IOV and virtual functions comes to mind) that are untested (at least by me) in Proxmox/xcp-ng. I don't even dare suggesting to change it because the company is heavily invested on VMware.