Well, a couple of years before that it was all NFTs all the time. Then before that it was web3. Then before that it was the blockchain in general. And then before that it was Haskell and monads.
That's just how it goes.
That's just how it goes.
I joined HN around the time category theory was starting to take off so not sure what the topic du jour was before that.
There was a period where it felt like Hacker News was a front-end dev message board.