I moved into an apartment with a high-end washer/dryer combo and was displeased to find out that it comes with a 30-second jingle every time it does anything that you can't turn off. Apparently it's ubiquitous now as I've whined about this to any visitor who hears it and they tell me theirs does it too.

It seems like a show of power. "You're going to give us $4000 for some appliances and we're going to make you listen to a 30-second MIDI track each time your load is done, and there's nothing you can do about it :)"