I am not so sure... I am a well seasoned sysadmin, been doing server, network, architecture. I consider myself a solid linux/network expert and have managed datacenters. When I look for a new/more exciting job, or for a pay raise, all I see are "cloud, AWS, devops". I never see "old school" sysadmin jobs e.g. as you say, we have a room full of linux boxes and we manage them with ansible/scripts/etc, but we design and maintain them ourselves, come join our team".