Maybe the COBOL devs aren’t here.
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If I were to venture to guess: I'd say "most developers" seek work-life balance and aren't interested in reading long-form articles on how to do X or Y when they are off the clock.
Towards the end, I worked on a project to port Wang VS OS and its COBOL to AIX. I was tasked finding issues with COBOL Programs we had on the VS. It was a good environment, but Wang went CPT 11 before it was ready :) It was rather close to being complete.