Growing up it was mandatory (I started playing around 1990), wore one til I got to college and it wasn't mandatory anymore. I remember there were various brands/models, some more comfortable than others, I'm sure now there are even better ones than back then and a lot more to choose from since there's more companies making them now. I recently saw CCM, Bauer,and Shock Doctor even make base layers with them built in which seems like a nice option, albeit a very expensive one. Now, personally, I don't know if I'm going to wear one, I mean I bet you're more likely to get cut on wrists/back of legs, and most don't even wear anything in those areas. This tragedy appears to have been avoidable from what I saw, I've never seen anyone's leg naturally extend how his did but that's just my opinion.