>I met many programmers during the boom years of software that straight out refused to develop any type of soft or managerial skills. [If you’ve been] working only on the comfortable stuff like developing tech skills, you should have seen this coming. It's very, very, very hard to maintain sharp coding skills decade after decade.

It’s funny you say this. I’ve observed the opposite: even basic coding skills can atrophy extremely quickly in previously sharp developers who quit coding to go onto a management track. The devs who never quit coding are the ones who stay sharp into old age; the ones who have problems getting hired in their 50s are the managers who quit coding in their 30s, worked the same middle-management position for 15+ years, and as a result have a skill/knowledge set that’s 15+ years out of date and can't answer FizzBuzz-level questions in first-round pulse-check interviews.