Instead, about 40% what was called 'sys admins' were pushed to become devops. The 'sys admin who knew cfengine' became a 'devops person who knew ansible'. Deploys and cloud APIs just became another thing to automate.
The bottom 60% - the shit ones who got paid 120,000GBP to copy paste commands they didn't understand from word documents into Solaris 8 boxes in 2010 because they couldn't actually automate anything - left the industry.
Most engineers simply don't have a meaningful understanding of the internals of large-scale environments.
I wish. They are still here and still copy+pasting commands they don't understand. The entire linux world is still dominated by these people. The whole "howto" culture is still very much alive and kicking.