https://notion.so It’s a web-based editor with a good android app. Has basic formatting, plugins/integrations, and dark mode. It’s free for individual use cases. Has some nice paid features for collaboration and business use cases, though the free plan still allows sharing and concurrent editing.

E: noticed this is in self hosted after posting. Maybe not what you’re looking for, but it’s a good service if you’re ok with that.

Hot damn, where can I sign up?!?! I get the same except for a 1.2 TB data cap and pay $130/mo. Xfinity in the Denver metro area. Finally getting fiber this winter, symmetrical gigabit for $90.