Re: My boss says "your job will be gone in 5 years"
I am closing in on 50. I moved from VMS to MS-DOS to Mac to Windows to Linux to Windows to Linux over the years.
The last 3 jobs have been managing a mixed environment with Windows and Linux servers and PCs (and VMWare).The previous one was mainly Windows with a couple of Linux servers (mail and Nagios), the current one is 95% Linux with a few test Windows installations, with VirtualBox, VMware and Hyper-V virtualisation.
A lot of companies won't even look at the cloud and many can't for legal or contractual reasons.
Also, those machines in the cloud, they still need customer administration of sorts, even if things like patching and backups are (hopefully) properly handled by the provider. User and access management, for example, are still the domain of the customer on individual machines. And if it is an instance cloud, you still need to manage the VMs themselves, different for managed applications, like Office365, SalesForce etc.