The average tenure of a police chief in my state is two years. The average tenure of a Sheriff here is 18 years. I was fortunate to be the Chief Deputy for terms 5,6,7 of a 7-term Sheriff. I started in 2009. It took until 2014 to turn the culture to the point that breaking out of the "always done it this way" mode, and even then, it took waging an instructor war among my own staff.
Quite frankly, some who couldn't adapt got left behind, and through attrition of both instructors and personnel, we selected people who were part of what is now the "way we do it", and part of that is challenging our own thinking.
Thankfully, the program will not be abandoned by the new admin. In fact, it should get even better, but had the election gone the other way, "my" guys would already be back to shooting a qual course and a night fire once per year.
Instead, I just left a meeting in which we planned out a year's worth of actual training.