If you are able now to create 10 products instead of 1 in the same time frame you will have to plan, review and maintain 10 things instead of 1. How can this work? I mean to double your productivity is a huge jump but 10x sounds unsustainable.

Well, AI fanatics aren't about longevity or maintaining things. The fact that the LLM spit out a bunch of code is good enough for them. Drive-by PRs and vaporware are their bread & butter.