Seems like you’re nesting virtualization too much. Stick with 1 level of virtualization. If it’s a server, I’d use proxmox on bare metal. Its a server so split services per VM/container. Install OMV on its own VM. Another for docker, with docker services ran by a non root user.

What does this mean exactly? Is this similar to NICs have SR-IOV and we can split it up the GPU like vGPU?

For $100 it doesn’t seem bad. It has hot swappable red kailh switches. I don’t know any major keyboard that sells hot swap switches. What makes keyboards worth it especially at $300? I only have corsair and logitech keyboards but hot swappable and it looks simple to open are features new to me.