Impressive for whom? It's impressive for the service to have such growth at that scale, the code being slop is somewhat irrelevant. Your comment just seems like mood affiliation (AI should be dismissed, growth was from AI, therefore growth should be dismissed).
How is it impressive if we all know it's autogenerated? There's no more people there than there were before. Heck, at ~2x growth that's possibly a decrease in real humans there since bots generate loads of them per person
Is it impressive? All it's doing is decaying the services. 15 years ago never have imagined I would go to the lengths to host a github alternative on a VPS but after doing just this (also being the last one in the my professional group to do so), GitHub is giving a master class in destroying their reputation in pursuit of advocating for hostile entities.
Not all growth is good, especially growth that is actively hurting the company.
There is an equilibrium in both nature and software. Purposely designing systems that mimic the effects of cancer is going to benefit who exactly?