[oofsa]

I believe the issue is not a lack of content, but the quality of the content. There are so many decks on https://ankiweb.net/shared/decks/, including ones for Kotlin (https://ankiweb.net/shared/decks/kotlin) and Trigonometry (https://ankiweb.net/shared/decks/trigonometry), but most of them are of low quality or not what I want. Sometimes it's easier to just create a deck by myself.

[blasterjeff151]

Hmm - I've rarely used prebuilt decks but maybe I should consider that. Other services besides Anki have them as well. iDoRecall has a bunch that are tied in with OpenStax (a "free e-textbooks for all" project).