It seems that anytime someone speaks or writes about how VMs they have, they always tend to say how many VMs per server.  This information is almost irrelevant  unless you know how big was that server.  I much prefer if people would report how many VMs per CPU core they have.  That’s meaningful, but what if you have some VMs with 1 vCPU and some with 2 or 4 vCPUs.  In that case an even better report is how many virtual CPUs (vCPUs) per physical CPU (pCPU) core.