I can't speak to any wider trend but I read this article as a pushback against the hype that maybe makes note-taking out to be a more powerful tool than it really is.

I tried note-taking and spaced repetition for a while. To the extent that it replaced mindless HN reading, it was positive but I can also see how easy it is to pour in buckets of time without much benefit. It's a very thirsty pursuit - there's always more you could do and you never reach a clear stopping point.