The Jets were mindlessly hotshotted into Phoenix though. That franchise should've never left Winnipeg, but the NHL was just too enamored with the growing southern/western populations and thought more people = more hockey fans. Once this initial hype and newness wore off the Coyotes were dead. They've been a dead franchise for a decade or more.
Vegas will be the same. Once the newness wears off they will be treated like a Vegas stage show that's run its course and is no longer popular. Only those shows are moved down the bill or cancelled...what is going to be done with this team?
It was more than that, economics were a big part. For both the Jets and Nordiques moving. The Canadian dollar was terrible, think it was something like $1CDN=$.65 US, both teams needed new arenas and the governments wouldn't foot the bill (not saying they should) and they couldn't find a local buyer. The difference is, The Nords moved to a cold-weather city, where the NHL previously failed, and were successful immediately. if the Nordiques moved to Phoenix, situation would probably be very different.
The league saw it coming for years. The Atlanta owners had been feuding and suing one another for a long time. They looked for buyers for a long time. It didn't happen so they sold the team to True North and that was that. Just like with Winnipeg - there were no buyers who were interested in keeping the team in Winnipeg.
Supposedly, they did have a local buyer lined up. However, the group that bought the Hawks also bought the arena. Or maybe it was the arena was sold to a different group. Doesn't matter, but the new owners of the arena did not want the Thrashers. Wanted to keep the dates open for other events. That is when they realized they had no choice but to sell to True North.