> Spaced repetition is not meant for conceptual things or skills. It's meant for facts.
> It has little to no relevance in math, physics, and engineering.
That's one bit I disagree with. Engineering is full of facts/concepts, things you often need to know inherently to be able to apply them, or even to know to google them at the right time. So I think SRS can apply there too.
I disagree also. I have lots of formulae, proofs and more as mathjax in my Anki cards.
You'd be surprised how big of a help this actually is for college exams. Not only for cramming before exams but also to retain the facts after for follow up classes (I see other students constantly struggle with having to relearn whole subjects while I don't because Anki implicitly makes me relearn them every week).
Spaced repetition is not meant for conceptual things or skills. It's meant for only the simplest of facts.
It's meant particularly for foreign language vocab, names and quantities in medical school, names of cases in law school, that sort of thing.
It has little to no relevance in math, physics, and engineering.
Just because it's not meant for all things doesn't mean it doesn't excel at some things.