Took a small sample of some of the first coaches that came to mind to see how long they spend with each team on average.
Laviolette averages about 4.2 years per team
Gallant averages 2.75
Ruff averages 7.67
Peter DeBoer averages 3
Todd McLellan averages 5
Boudreau averaged 3.75
There are always some exceptions, most of them seem to be the guys that have a lot of success (like Cooper in Tampa going on 11 years), but the average shelf life for a coach seems to be about 3-5 years. This is Dean's fourth full year, there has been no progression in terms of the teams record, and a lot of the issues people had with him back in in 2020 are still issues today. It seems like if there isn't a drastic change soon, and a playoff series victory in April, he's just reached his shelf life. Nothing to be ashamed of, but you can't keep trotting out the same thing for the next half a decade and just hope it's different this time.
Dean is also the 9th longest tenured head coach in the league, the only coaches who have been with their current team longer are Cooper, Sullivan (PIT), Bednar, Brind'Amour, Berube, McLellan, DJ Smith (OTT), and Keefe. Four of them have won Cups. Brind'Amour is a Carolina legend and fairly consistently wins at least a playoff round or two. There's just no reason we need to keep hitching our wagon to Evason if the results aren't there.