Just consider how many times coaches have been rated one of the best in the game, then a few years later, for them be unwanted. I will give you all a quick list off the top of my head
Brian Smith taking Easts to a GF in 2010 then unwanted by 2012
Tim Sheens taking Wests to week 3 of the semis in 2010, unwanted by 2012
Chris Anderson winning a comp with Melbourne in 1999, then unwanted by 2003.
Des Hasler winning the comp with Manly in 2011, unwanted by 2017
Ted Glossop winning a comp with Canterbury in 1980, then being NSW coach in the early 80's, unwanted by 88.
Michael Maguire winning a comp with Souths in 2014, unwanted by 2017.
If Brisbane fail to make the semis like I think they will, then Wayne Bennett may be unwanted by the end of the year.
Do good coaches suddenly become bad coaches?
Jack Gibson had a philosophy to only stay at a club for 3 years. It may have had something to do with clubs getting stale with the same coach, maybe that a club needs an injection of new ideas, maybe familiarity breeds contempt, ie the players. Maybe it had something to do with not getting sacked? I will also add that with Gibson had a 77% win strike rate coaching Easts glamour team from 74 to 76, followed by a 48% strike rate coaching Souths from 78 to 79, followed by a 73% win strike rate at Parra from 81 to 83 and then a 43% strike rate coaching Cronulla from 85 to 87.
I am not too sure about having long term coaches. Bennett had a lot of success at Brisbane over a 20 year period, when he had a superior roster than all the other clubs. Bellamy has had a lot of success with Melbourne over a 15 year period, but he has also had some very good talent to build his team around. They are probably the only 2 coaches who have had long term success at one club. They are probably the 2 longest serving coaches at a single club.
I will also add that Bennett only stayed with us for 3 years, then next year we failed to make the semis. He only lasted 3 years of his 4 year contract with Newcastle and left them in disarray . Last year was his third year back at Brisbane and they look to be on the slide in his 4th year.
This will be 4 and half years for Mary at our club. Maybe it is time for a new coach.
Just a bit of food for thought.