First thing I do when I get a smart appliance is scan it with nmap. This has revealed some interesting Easter eggs, like my Davis instruments air quality sensors having a local REST API.
Doing the usual scan against my GE washer and dryer shows that port 53 is listening. What could that be for? Is there a way I can at least query their status locally or something?
When I got the washer and dryer I was excited about the smart home features because getting an alert when my laundry is done or starting the washer remotely so the clothes are done when I get home are genuinely useful features. However, last time I checked the app none of that was available, so I just have these Trojan horses in my home spying on me with no benefit in exchange. Their app wanted my freaking mailing address when I signed up for their mandatory account, so the features mentioned above are the least they could offer in exchange for my digital soul. But I digress.
My fridge is in a similar situation. It commits the additional cardinal sin of ONLY being controllable via the app, with no on-board temp or filter status indicators whatsoever.
Set up a pihole on your network and add a few block lists. If your IoT appliances phone home at least you can block the traffic and monitor what things phone home.
As for buying appliances that are not smart, It takes extra effort and a trade-off in features.
For example, my toothbrush has Bluetooth in it. if I want a non-Bluetooth toothbrush I’d have to get a lower quality model because they simply don’t make one without it.
Most people buy whatever’s on sale, And considering how expensive home appliances are they usually put the expensive featured models on sale since there’s a bigger margin.
So if I wanted to get a basic one with less features, that’s not smart it would actually be more expensive because it will never go on sale.