How come (some) clothes dryers will buzz at the end of the cycle, btu not washing machines? Wouldn’t that be helpful, too? - JInx
Plenty of washers have an end-of-cycle signal. But, my WAG is that most of them don’t because it’s less important than having one on the dryer, since leaving clothes in the dryer too long makes them even more wrinkly and hard to iron. If you take them out warm and slightly damp, you can hang them up and get away with little or no ironing.
Just for the record, my washing machine (a Whirlpool) buzzes at the end of its cycle. It’s actually louder than the dryer’s.
Mine buzzes ,if I let it, but I hate it when appliances tell me what to do. It is capable of buzzing at the beginning of the rinse cycle, and/or at the end.
What makes you so sure washers don’t? My washer beeps like a high-pitched banshee, whereas my dryer cycle ends silently.
Both my washer and dryer have buzzers that can be turned on or off, depending on what you need to hear.
My Maytag Neptune TL chimes at the end of it’s cycle. 
If my washing machine buzzes, but I am not in the basement, does it make a sound?