Yeah I agree with you overall in the What to learn in the cloud area, but I wouldn't just silo on Microsoft technologies. In the early 2000s nearly everyone built their network around Microsoft services like Active Directory, but we are seeing less and less of this going forward.
Microsoft is a major cloud player, but not even the biggest one. All their core cloud services are also offered by their competitors. So there will be less vendor lock in then the days of old.
I find Vendor lock-in is even worse once we get beyond running virtual machines in the public cloud. VMs are portable.
Apps and Services running in a cloud environment are tailored to that environment. Not so sure they'd be easy to move from one vendor to another.