Obsidian is not a block editor. Can you put a Kanban or any other complex block in the middle of a document? From my understanding, you can't. Here's how to think of it: a block editor is a basically a virtualized list with dynamic loading, so it can load any arbitrary component *while* allowing the user to interact with the list as it was a singular piece of document - so you get text selection between these discrete blocks, editing, etc like you would in a regular text editor.
Again, from my understanding, Obsidian is not that. If I remember correctly it is based on CodeMirror which is designed to only handle (EDIT: rich) text.
Edit (addendum): BTW, I'm not sure your Obsidian RAM reading is correct, an empty instance of Obsidian with one note uses 285MB (all 4 processes together) on my machine (M1).
Here is the screenshot showing memory consumption of Obsidian (I did wait 30 seconds for memory to settle down after initial spike which was 240 MB): https://pasteboard.co/uW2lPNSbL7f7.png
EDIT: Btw, I do have plans to cut RAM usage significantly in Daino Notes (I focused more on load time and responsiveness). But getting back to my point - I can do these optimizations because those RAM inefficiencies are a result of my code, not some abstractions I can't change.
Again, from my understanding, Obsidian is not that. If I remember correctly it is based on CodeMirror which is designed to only handle (EDIT: rich) text.
Edit (addendum): BTW, I'm not sure your Obsidian RAM reading is correct, an empty instance of Obsidian with one note uses 285MB (all 4 processes together) on my machine (M1).