Basically any "brand name" product which isn't either family owned or privately run by an extremely idealistic founder/CEO ends up getting predictably worse over time. Once some private equity fund buys you out and determines you are not on the quality/price Pareto frontier and can manage to lose only .8% of your revenue making your product .9% cheaper, the die is already cast.

PE is the final form of capitalism, but this seems true with widely-held public companies as well with some notable exceptions like Apple.