The lack of structure and pressure is also a thing. In a traditional class you must show up or miss out. MOOCs are available at all times forever, which means you can watch them “someday”, which is usually the same as “never”.

Honestly I'd rather have the MOOCs there so I can access them as though they were a library. You get more context than on Stackoverflow but you don't have to commit to several classes or find out early on that you picked the wrong course.