I use a hybrid setup to help with study, lesson planning, and blogging. I use Obsidian to keep big, massive lists of tagged links and clippings from my Kindle account, so that I can search quickly and access that link from that thing. Obsidian isn’t mobile though, so I use Apple notes to temporary hold any ideas out in the wild, then periodically dump them all into Obsidian and clear them out.
But when it comes to actually connecting and deploying my notes, I use a notebook. I don’t trust myself to think clearly with an internet-connected device. Paper also forces me to think with care and concision, rather than just blathering at length. It’s like music: constraint is inspiring.