I used the Zettelkasten idea for a bit more than a year, and it was truly a joy to use. Unimportant idea get naturally forgotten, while important/relevant ones get reinforced and revisited a lot. Building the links feels like having a deep discussion with a knowledgeable friend, and, once in a while, you get that surprising insight when a note from a book about a completely different topic you forgot you read pops up and sheds a new light on your current reading.

But the main weakness of that system is what makes it so powerful: it is, by nature, extremely time consuming. It is so powerful because, in order to add the smallest note, you need to sift through dozens of them, amend them, thinks about connections, create notes for those connections... I ended up finding that the joy and insights I got out were not worth the time investment. I guess this is a reason app builders do not emphasize the process: "get more out of your reading by spending a few more hours per day organizing your thoughts" is not super sexy.

I now see that system as relevant only to people whose _main_ focus is to collect information and extract new insights from them: philosophers, anthropologists, some types of sociologists... But if you just want to remember a blog post about weird CSS tricks, this is probably overkill.