Obviously not advanced as notion but I’m just writing text here, it doesn’t need to be advanced.
The hardest part when writing is the act of writing itself, web apps just seem too bloated for my use case of simple text.
The things you can do with dynamic content (database) really make it more than a wiki. People can, and do, plan their whole life in it. Project management, SEO-indexable pages, lots of surprisingly cool stuff. I used to use it quite frequently, though my ADHD causes me gravitate a bit more heavily towards organizational mechanisms like it to cope.
Using it to make impromptu priority lists that will do a lot of the reorganization for me as I slot new content in is really nice. It’s a bit of overhead but it’s often worth it for anything nontrivial. I keep a backlog in it and use it for scratch work and rough design docs (final copy goes in our actual deployed-from-markdown docs).