I used to live in a small town in Michigan which had city provided power using a dam. It was inexpensive and highly reliable. But every couple of years the big power company in the state would try and get the city to sell them the utility. After I moved a city council for whatever reason ended up selling. As a result the cost of electricity immediately doubled and power outages occurred regularly due to reduced maint…
Perhaps I'm too cynical, but somehow I doubt that those with decision making power that were in favour of selling at the time regret much. Our modern political economy is almost entirely focused on ensuring that everything that can be sold to private entities (read, the market) is. In this ideology the sale would be viewed as a success regardless of any practical downsides.
They possibly even managed to buy a luxury car in the years that followed. Or went on holiday more often. Or somehow unexpectedly landed a nice and cush job at said energy company.