It could be a fraction of the features, like just text editing and good lists, and you could always switch to editing markdown if you needed to.
Have you checked out the mobile toolbar? It makes indent/unindenting list items easy.
- raw text files
- raw markdown files
- + homemade server rendering the markdown live
- Obsidian
- Notion
I stick with Notion because it really is infinitely configurable. I rarely use 99% of the plugins but I have, in the past, used their API to populate the show the results of my experiments straight from my Python code to a Notion Table. Super convenient. I take regular (every six months or so) hard exports that I save to disk in case the company goes belly up tomorrow. I'm comfortable with it.