Github stars? That's 100% marketing. Shit that clears a low quality bar can rack up stars like crazy just by being well marketed.
Number of startups? That's 100% marketing. Investors put money into products that have traction, or founders that look impressive, and both of those are mostly marketing.
People actually are vibe coding stuff rather than using SaaS though, that one's for real. Your example is hyperbolic, but the Tailwind scenario is just one example of AI putting pressure on products.