Back when I had a window a/c idea back in the day, I recall it being a real hassle right at the end of Summer when fall was coming around.
You would get all kinds of tree debris and leaves blowing onto the area of the window a/c unit that sat outside the window.
Cleaning it off was easily hard to do, and especially if it was on a 2nd floor room. In these cases I had to regularly make the dining room filthy and bring all that tree debris in when I was taking out the window a/c unit to put it away for the winter. I would have to vacuum up all the junk off our dining room floor and then sanitize it as well. It was more or less having to do a deep disinfect of the dining room after all of this. I am so glad these nights are long gone and today pretty much everyone has central heating and a/cs. I do not miss the nights of window a/cs 1 bit! Having central a/c there is no uninstalling it every single year. It is there all the time and also works as your heater. Though central heating and a/cs are much more overpriced in energy to run than window a/c units or even gas furnaces, I still love central heating and cooling over the way things used to be. Especially when it comes to window a/cs. I am truthfully not a fan of window a/cs for the exact reason I explained above with the tree debris!