I think the idea that the new owners have no idea what they are doing and are making a really stupid decision is way off the mark.
Every manager is replaced by the owners eventually: the question is just when.
For a club of our size, one option is to just stick with whoever’s in charge until something forces the issue. If the team do incredibly well, the manager will leave and go to a bigger club. If the team do very badly, it will become necessary to take steps to rescue the situation with a managerial change. If you do that, then you end up with, typically, a mid-season appointment in difficult circumstances appointing whoever is available in a panic.
Another option is to plan for the change, thinking strategically about the best moment to make that change to give the best chance of it being successful.
As new owners, you can see why they would avoid making a change immediately when they acquired the club: it could destabilise the team mid-season, negatively affect the promotion push, leave the new coach with no time to prepare etc.
You can also see why now is a reasonable time to make a change. The weeks between a season ending and before the transfer window opens are the ideal time. This season we still have parachute payments to work with, which Year 2 and Year 3 could have gone. We have a competitive squad to work with. We have some young talent that are on an upward trajectory. It’s a reasonable business decision to press the button now on replacing the manager.
Of course it’s not without risk. It is very possible Wilder could have led the team to promotion next season, following in Hecky’s footsteps of failed play-offs to 2nd place finish. But it is equally possible we could have missed out again.
Some people seem to be interpreting this as if you sack a manager when he’s done a crap job, so the board are stupid, because Wilder clearly hasn’t done a crap job. Wilder did a good job. But the board see this as a good time to put someone else in charge of coaching the team. It’s a bold decision, based on thinking strategically over the coming seasons, but it’s not a stupid reactionary one.