Currently, I have to set a timer on my phone to go check the washer and dryer because my laundry is in the basement and I'm probably on the 2nd floor or outside.
I would love it if these things would run on my network with simple, published APIs exposed to tell me status so that I could know that I could have automated alerting and know that they wouldn't fail in the future when their manufacturer drops support.
It's all-local, and requires no integration with the washer. 220V dryers may be a little trickier, but still easy enough if you're comfortable with basic electrical stuff. You can put a sensor on an indicator light, or put a current clamp on one of the wires. Usually you only care when the washer is done though, so you can move your clothes over.
[1] I use https://www.amazon.com/dp/B0BPY5D1KC for Zigbee, but there are WiFi/Z-wave/other options.
Then we could run botnets from those things, too. And ransomwares! I would love it if all the connected crap in my city went down at the same time, so that maybe people would think twice before buying a connected fridge.
but manufacturers want data, they want a post sales "relationship".
I think only legislation can fix this.
or maybe some elon musk type who makes more open cars, appliances, etc.
with trust, trade is unfettered.
see how people talk about brother laser printers that are trustworthy.