&gt;<i>The thing is, a lecturer spends 20 minutes doodling this and can explain most of the same, especially if there is some ability to directly interact with the audience and clear up misconceptions.</i><p>And most of it, even in the best universities, flies right over the student&#x27;s head, or they understand how to handle the abstraction and notation, but lack an intuitive model of what&#x27;s going on in their head.<p>&gt;<i>By contrast, making the fancy animated version takes 20 hours, plus another several hundred hours (or perhaps 1-2 orders of magnitude more) to build the framework underneath.</i><p>Once it&#x27;s built though, it can be delivered to billions of students.<p>There&#x27;s not even a contest between the quality of this and some lecturer&#x27;s doodles -- this is an order of magnitude better.<p>And if we want, we can always augment it with a lecturer explaining the graphics further and going into detail.<p>&gt;<i>Ideally we’d have ten thousand skilled animator&#x2F;programmer&#x2F;educators working on creating such explanations, sharing tools and ideas, coordinating effort to build more complete curricula, etc., but there’s not currently anyone paying them to do it</i><p>That&#x27;s the problem -- noone paying them --, not that it&#x27;s too difficult or expensive.<p>If anything we spend several orders of magnitude more on BS such as dog toys anually that it would cost to hire those &quot;ten thousand skilled animator&#x2F;programmer&#x2F;educators&quot;.