Comment by joseda-hg

It's one of the worst parts of being self taught, beginner level stuff has a large interest base because everyone can get into it.

Advanced level stuff usually gets recommended directly by experts or will be interesting to beginners too as a way of seeing the high level.

Mid level stuff doesn't have that wide appeal, the freshness in the mind of the experts, or the ease of getting into, so it's not usually worth it for creators if the main metric is reach/interest

Structured (taught) learning is better in this regard, it at least gives you structure to cling on to at the mid level