Wow. It's hard to believe that people are earnestly supposing this. From everything we have evidence of so far, AI generated code is destined to be a prolific font of tech debt. It's irregular, inconsistent, highly sensitive to specific prompting and context inputs, and generally produces "make do" code at best. It can be extremely "cheap" vs traditional contributions, but gets to where it's going by the shortest path rather than the most forward-looking or comprehensive.
And so it does indeed work best with young projects where the prevailing tech debt load remains low enough that the project can absorb large additions of new debt and incoherence, but that's not to the advantage of young projects. It's setting those projects up to be young and debt-swamped much sooner than they would otherwise be.
If mature projects can't use generative AI as extensively, that's going to be to their advantage, not their detriment -- at least in terms of tech debt. They'll be forced to continue plodding along at their lumbering pace while competitors bloom and burst in cycles of rapid initial development followed by premature seizure/collapse.
And to be clear: AI generated code can have real value, but the framing of this article is bonkers.