MOOCs are for introducing a new topic; they can't make you an expert in anything. I like the occasional (as in, literally once a year) MOOC to see something co

MOOCs are for introducing a new topic; they can't make you an expert in anything. I like the occasional (as in, literally once a year) MOOC to see something completely outside my specific profession. But the only way to get good within my profession is hands-on activity. It's similar to reading HN, or even ACM/IEEE articles. All of that stuff is for seeing new material, not for getting better at my bread and butter.