Earlier quoted context omitted.
I’d be really interested in an “i used both” comparison between esxi’s free offering and proxmox for this sort of purpose. I imagine esxi might be more polished, but also more limited.
I've used both, though not for anything especially complicated. Your guess about the polish level is correct; ESXi blows Proxmox out of the water interface-wise, especially for some specific tasks like configuring networks or managing PCI passthrough devices. As far as "more limited" goes, I can't say I noticed much of a feature discrepancy, although being open and just sitting atop KVM, Proxmox doesn't have any of t…
That was my first (and last) hurdle when wanting to try out ESXi...
I booted up the installer only to be greeted by a "not enough RAM" message. I believe it's 4GB minimum, which my tiny machine had, but ESXi read it as 3.9GB instead of 4.0GB and refused to budge.
Very happy with Proxmox on the other hand! Having access to the underlying Debian is also quite nice if you need to do something that's not supported by the interface.