Consider how much has changed in the NHL since the start of this decade. Back then, there was a different playoff format. There wasn't a Department of Player Safety. There was still a Southeast Division, and the Atlanta Thrashers were a part of it. There were a lot more fights.
It's staggering to think about all that's happened in the game over the last 10 years, just as it's staggering to think about what it'll look like by the end of next decade.
Here are 10 questions about the next 10 years of the NHL, beginning with the most important one: