Vancouver is a hell of a lot different then halfway across the world.
How about Sochi?
I can't find the comparison for Sochi or PyongChang.
Useless anecdote: my Mancunian friend became a diehard hockey fan and has kept it up ever since 2010, and my father in law who took a dim view of hockey his whole life gave it a chance in 2018 and routinely watches the Caps now.
Though in both cases, part of the conversion relied on me explaining why players do what they do on the ice, and what the hell is happening. Hockey is a really inaccessible sport to the casual newbs. Honestly, basketball isn't better either. For all their broadcast warts, the NFL typically does a great job of explaining what you're seeing so that new viewers can learn the basics just by watching. You don't get that with hockey. Of course, the routine 20-30 second breaks and constant chances for replay and explanation make that possible.
However, the Olympics spurred both conversions. The Olympics seems to be the time when people give different sports a shot. And I'm not sure the NHL should be turning down any opportunities for growing the fanbase. Especially when they'd have to compete with the Olympics for viewers anyway.