Is Obsidian based on or inspired by any particular note taking methods?

I’ve been reading a bunch of Reddit posts about Executive Functioning since I really struggle with that, and I found one where someone recommended OP to use a PKMS, specifically Obsidian, and said “Obsidian is based on the Zettelkasten technique” which sounds incorrect, however I did some looking up and didn’t find any answers to this question. Did the devs have any note taking methods in mind when they made Obsidian, or did they intend on the app being the free for all blank canvas it is today?

It’s not — it was specifically made to be very flexible. (Sorry to hear about the executive functioning!)