1. A huge part of the demographic group visiting HN is biased in favor of AI given the sort of startups YN decides to fund.
2. The large amount of start-ups funded by HN that are related to AI should answer your question.
I am slightly leaning towards the first one combined with a little bit of the latter one. A lot of people working in startups will be used to building up a structure from scratch where incorporating the latest "thing" is not that big of a deal. It also means they rarely see the long term impact of the code they write.
They have a huge blind spot for the reality of existing code bases and company structures where introducing these tools isn't as easy and code needs to be maintained for much longer.
I categorize that as "an explosion", personally. Do you disagree?
His point is that if AI were so great, loads of NON AI startups would be appearing because the cost to make a company should have dramatically dropped and new opportunities for disruption in existing businesses should be available.
His point is that they aren't.
You pointing at AI startups in YC actually highlights the opposite of what you think it does. People are still looking for the problems for AI to solve, not solving problems with AI.
Your example is actually a bell-weather that there is no great leap forward yet, otherwise the companies delivering real world value would be taking spots in YC from the AI tooling companies. Because they'd be disrupting existing businesses and making lots of money, instead of trying to sell AI tools.
It's like you pointing at the large batches of YC companies doing crypto 5/10 years ago and saying that proves crypto is a game changer and everyone would soon be using crypto in their development.
The YC companies are focused on the AI tool hype, not making money by solving real world problems.
The amount of start-ups getting into YC hasn't really changed YoY: The W23 batch had 282 companies and W24 260.