AppFlowy. Heard of it? It's a FOSS take on Notion! https://appflowy.io/ I found it today while researching FOSS replacements for #obsidian.
I've... not had the best experience with Obsidian.
I poured, oh, maybe a hundred hours or more into making Obsidian into my dream KMS. Instead, what I did was make myself incredibly frustrated.
My "dream":
- Record information. Anywhere. Anytime. Even hands-free.
- Customizable
- "Power user"-friendly! This means - **keyboard navigation for all things**, folks! If you make me reach for a mouse, you've just interrupted me!
Obsidian is all of this except:
- Hands-free? That depends entirely on your OS. For iOS, you have to use Shortcuts. 
- Customizable: it's an electron app BUT it's not FOSS and when writing JS for it (JS idiot that I am) you run into the classic "WTF is *this*" problem. The plugin system works but your JS doesn't have to get too complicated, or the data you operate on too large, before performance tanks **hard**.
- Keyboard navigation: there are toolbars and toolbars yet there aren't keyboard shortcuts, nor can you create keyboard shortcuts, for navigating the toolbars!
I just don't understand Obsidian's target market! I don't. It seems like a power tool but... not?
Sure, if I was a "real" power user (No True Scotsman fallacy...), I'd create keyboard shortcuts to just the (zillions) of commands that I use.
Yeah, no. While I need shortcuts to frequently used commands, I need a toolbar that exposes secondary, tertiary, et al commands in my workflow (such as it constitutes a "flow" at all
but I digress) AND I need to have keyboard navigation of same.
I love the idea behind #obsidian but it feels like the worst kind of Swiss Army Knife to me—unless you truly just want a bunch of cross linked markdown files. If so, I understand #logseq will get you there too.
So, anyway, I'm going to try #appflowy. Maybe that won't explode my brain. And, as FOSS, it is really and truly customizable!
EDIT: FOSS from a startup. Gives me Hashicorp vibes. Hmmm