> Most people are not great autodidacts, as shown by the miserable cometion rates of online courses. For me (though I consider myself as a pretty good autodida

> Most people are not great autodidacts, as shown by the miserable cometion rates of online courses. For me (though I consider myself as a pretty good autodidact) the reason why I didn't complete many MOOCs (before you had to pay to even get a certificate) was simply lack of time: My main "job" is completing a PhD in applied mathematics, so if there happened anything for my PhD work that required some time-intense intervention (say, I found out that my proof idea didn't work so well as I originally thought; or if the advisor got the idea (which does not mean that it was always a bad idea, just to be clear) that I should read up more papers in some specific area - also very autodidactic) I sometimes had no other choice than stopping some MOOC that I was attaining.