I wish articles would at least explain acronyms the first time they're mentioned. Just putting the full form in parenthesis would go a long way and not disturb readers that already know them.

Maybe it's because I'm not a native speaker, but I have never heard of MOOCs before – and I'm consuming a lot of content in English on a daily basis (e.g. on HN).

Plea for future article writers: It won't kill you to hyperlink the first occurrence of acronyms (especially titular ones) in the block text. Those ten seconds will not only save hundreds of readers time (even if they only mouse over the link to see the expansion in the Wikipedia page title). It will also prevent readers opening your article, seeing the same unexplained acronym mentioned every second sentence and deciding that a google search with an unknown amount of "figuring out which of all the results matches the article context" is not worth their time.

JIT in case you were wondering like me: https://en.wikipedia.org/wiki/Just-in-time_learning