Agree completely! Even the sounds on "more advanced" microwaves are worse.
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 :)"
Microwaves are already loud appliances, I can hear it running from the next room. Meanwhile you'll be hard-pressed to find a toaster that beeps.
And there are plenty of other fans. :)