By this point you've burnt up any potential efficiency gains. So you spent a lot of hours learning a new tool which you then have to spend a lot of additional hours to babysit and correct, so much that you'll be very far from those claimed productivity gains. Plus the skills you need to verify and fix it will atrophy. So that learning curve earns you nothing expect the ability to put "AI" somewhere on your CV, which I expect will lose a lot of its lustre in 1-2 years time when everybody has made enough experiences with vibe coders who don't, or no longer can, enusre the quality of their super-efficient output.