Why haven't any coaches been fired yet this season?

Last season was a tumultuous one for NHL coaches. On Nov. 27, 2016, Gerard Gallant stood by the loading dock of PNC Arena in Raleigh, North Carolina, luggage in tow, waiting for a cab. He had just been fired as coach of the Florida Panthers.
Claude Julien, who won a Stanley Cup with the Boston Bruins in 2011 and returned to the finals in 2013, was told the team would go in a different direction -- and the announcement was made public on the morning of the Patriots' Super Bowl LI parade, as if to muddle its impact.
The Montreal Canadiens fired Michel Therrien a week later, and quickly scooped up Julien. Jack Capuano was let go by the New York Islanders, and replaced by then-assistant general manager Doug Weight. St. Louis Blues GM Doug Armstrong had once called Ken Hitchcock "a Hall of Fame coach" and one of his "best friends" -- but fired the veteran coach on Feb. 1, nine months after Hitchcock had led St. Louis to the Western Conference finals.
In-season coaching changes are ubiquitous in the modern NHL; all five of these examples occurred within the space of a few months. But as the 2017-18 season marches toward the trade deadline, an intriguing trend has taken hold: stability. No team has made a coaching change yet. It's the first time we've gone this far into a season without a switch since 1966-67 -- when the NHL first expanded beyond its Original Six.
So what gives?
When I posed the question to a Western Conference front-office executive this week, he quipped: "This league has cut ties with so many guys the last couple of years, maybe everyone just needed a break."
Indeed, the NHL has been a quick-trigger league of late; 34 coaches have been fired in-season over the past nine years. But there are clues as to why 2017-18 may be different.