In my experience, there really hasn't been that significant of a flood of money in this space for several years now, or at least not to the level I've seen based on discussion here on HN.
I think HN tends to skew towards conversations around models for some reason, but almost all my peers are either funding or working on either tooling or ML driven applications since 2021.
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I've found HN to have a horrible noise to value signal nowadays, and people with experience (eg. My friends in the YC community) deviating towards Bookface or in person meetups instead now.
There was a flood of new accounts in the 2020-22 period (my hunch is it's LessWrong, SSC, and Reddit driven based on the inside jokes and posts I've been seeing recently on HN) but they don't reflect the actual reality of the industry.