Certainly it's not unreasonable to expect a kitchen appliance to last at least a couple of decades.
When we moved to the Stately Manor, we purchased a GE gas stove; when we sold the place 19 years later, it was not only still working but nearly as good as new, with only some of the lettering on the knobs worn off from cleaning and similar normal wear and tear (and all of that on easily-replaceable components). We brought the microwave we'd purchased a few years previously1 and that too was still working well, though it had some steam-related rust in the chamber.
We've had less luck with toaster ovens, though some lasted longer than others. I'll never buy another toaster oven from Oster; the one we had not only didn't last very long but had abysmal controls, the sort that only malice could explain. We bought a washer and dryer set from Sears – made by Haier, if memory serves – and had to have control panels in both replaced within the first three or four years, twice in the case of the washer. When the washer's failed the second time, I sourced a replacement panel from Italy (ah, global supply chains) and installed it myself to save some money. Curiously, neither failed again for the remaining eight or nine years we had them (left them with the house).
There's just a lot of really crap appliances being made, and even with the help of reviews and such it's hard to find good ones, because many of the brands sell machines from different manufacturers, and model numbers change all the time.
1A Panasonic Inverter, my favorite model among those I've used. The Inverter, unlike most microwave ovens, actually reduces the magnatron output rather than cycling it on and off for lower "power levels". I don't know that actually makes a significant difference, but I like it anyway. And the Inverter's other features, such as its steam-sensing reheat function, work well, and I like the controls. Of course that's all largely subjective.