I've gone back and forth a bit between electronic and paper notes. For me, electronic just can't beat the physical location of paper. I know where in space a particular note is so it's easier for me to hone in on it. I sketch and do a lot of math and there's just no friction less way to do that in an app. I think I tend to remember concepts graphically too, so searching with text doesn't feel as natural.

Of all the note taking apps I've used though, obsidian is easily the best. The graph they have for connecting notes together is just great. And, I like that their storage system is just plain text files, so long after obsidian is gone, I'll still be able to look at them if I need to.