I remember a very respectable mentor 10 years ago mentioning to avoid mbed when it came out as this kinda thing comes and goes.<p>For a while I thought he was wrong and it would stick around. It did not.
Even though I never developed on Mbed, I always thought it was a cool project and I should take a look at it one day. I don't think Arm rolled this out right. It never looked like it was super easy to get going on a real, widely available dev board. Oh well, maybe it will thrive in the open.