Virtualization is good in e.g. cloud scenarios where the usage is spread out to different machines through out the day. Rather than have 10 machines averaging

Virtualization is good in e.g. cloud scenarios where the usage is spread out to different machines through out the day. Rather than have 10 machines averaging 5% utilization at all times you can have 1 machine with e.g. 60% utilization all the time. A win. Sadly, pointy-haired bosses have started putting developers on VMs which is exactly the opposite use case: all people loading their machines at roughly the same time (e.g. I've heard people claim that in Java 1/3rd of time is spent compiling. If you have more then 3 devs....). A fail.