Sure, core concepts like vms are still around but the practicality and common usage and comfort and ability to understand how they can be applied (like containe

Sure, core concepts like vms are still around but the practicality and common usage and comfort and ability to understand how they can be applied (like containers) does change, and does affect your ability to get jobs, or at least interview well. I'm also older, over 50, and I'm frustrated at all these people who are similarly experienced and complain that companies don't recognize their abilities. You have to update your skills and be able to talk about the current stuff. You are foolish if you don't practice before an interview. Before I switch jobs, I take it seriously and do something like 1 hour practice every day for a month. I look at current software engineering topics (I'm usually wasting time on hackernews so I'm up to date on the latest gossip). You have to try, people!