2022 is when tech funding dried up, so it stands to reason that we ran out of hacker topics. The odd person still doing something cool in their basement for fun does not supply a sufficient stream of curiosities to keep the feed full. That required the unique time (ZIRP, etc.) when people were paid handsomely to explore cool things day in, day out.

HN was a product of its time.

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> They are still being posted at the same rate based on my filtering.

"I rewrote X in Rust" isn't a hacker topic. Being able to draw some kind of connection to the tech isn't the same thing.