the skills that protect against displacement long-term are exactly what vibe coding erodes. an engineer who built with AI but never developed the instincts to spot its mistakes has a gap they don't know they have. this maintainer problem is a preview: when you can't tell the difference between a PR from someone who understood the code and one from someone who just prompted into it, the verification burden doesn't disappear. it shifts to whoever has enough skill to catch the errors.