>>7636
Physical is the best to remember and learn, but takes a lot of space to storage with time.
>>8834
Markdown is the best for visualization, can edit anywhere and it's just a text file.
I really like Obsidian and similar apps, mostly because they are just text but you can sync, add images, etc.
The one I liked most is Anytype. Just wish it was a bit more generous with free storage, 100MB is like e-mail in the 00s.
If you really really want something fancy and fully custom just use html, it's what everyone uses and will be using for decades.
Works for mobile too. If you want it you can add fonts, Javascript, CSS and whatever you need, even server connection and APIs.
Cons - have to program and host your schizophrenic dreams on it, wasting time.