Mochi is a nifty little markdown backed SRS app that I've replaced Anki with in my own workflows. Would love to be able to draw from the same vault/folder between the two.
So while yes, a dedicated app for SR would probably be "better", i'd then have to make tightly coupled user experiences to sync data back and forth between my knowledge base and my knowledge retention app.
To me they're two sides of the same coin. With that said i've long wanted to make my own app here for this stuff, but Obsidian seems very customizable, so i'm thinking i'll just try to make an extension which embeds the necessary metadata into the markdown files themselves.
Obsidian does have a plugin system that you might be able to use to add spaced repetition, but I don't know if anyone has written a plugin to do this yet.
A big thing i want in a note taking tool is Spaced Repetition, but not _just_ that, more like a way to manage how much information i'm going to try and keep sync'd with my actual brain.
I'd love this system to monitor how much time i'm dedicating to it, and how much knowledge i'm able to retain in my brain based on available quiz time and retention rates (which would vary, i suppose).
I've often debated writing it myself but so many of these note taking tools achieve 90% of what i want, but miss the retention phase. I want to pour my knowledge into Obsidian, i just want some additional tools to help keep some subset in sync with my brain.