Lowest common denominator though. If you can use just plain old VMs, there's probably little value in using the big cloud vendors. Traditional hosting would be loads cheaper.
No, not running your own data center. Traditional server hosting. Rackspace, Liquidweb, Packet.net and similar.
Meaning that if you're going to use the lowest common denominator, why not pay fair market prices for egress and compute?
Any value in cloud is typically the services that are higher level than a VM. Those services would be hard to put a generic multi-cloud facade in front of. It would be brittle and bug ridden.