Depends on how many apps you want.
Because most of it doesn't require the visuals to be good. But because of the format, the creators are incentivized to make shit concise. ~20 minutes is the sweetspot to maximize revenue for them so the good content creators (and there's 1000's of them) have gotten really good at getting their point across in 20 minutes or so unless if they specialize in longer form stuff. Podcasts tend to be a bunch of people just rambling about shit for 2-3 hours. Youtube videos are the the same people, or people in similar fields and of similar expertise actually putting effort into making the content concise, accurate, and easily searchable.