It can be an extra layer of security. At some point in the future there will probably be another exploit in supervisors or hardware that can be used to spy on o

It can be an extra layer of security. At some point in the future there will probably be another exploit in supervisors or hardware that can be used to spy on other tenants. With dedicated servers that becomes harder. I've heard of large companies that require their own hosts. But then again, if you're big enough it really makes sense to build your private cloud anyway.