A decent microwave. Mine is still going after 20 years.
Somewhat it sad that before kitchen appliances lasted 15-20 years(in my house the electric-oven/stove, fridge/freezer and dishwasher each lasted at least 15 years I think, and fridge still going strong for 20 year which is about my age...)
And now just 3-4 years at worst...
It's called "planned obsolescence"
Back then companys tried to get customers by trying to build the best product for the price,
but then they realized that its much more lucrative to sell the customer a new product every 3-5 years.
Basically there are 3 ways to "encourage" a customer to replace a old product with a new one:
1. Technological innovationFor example...
Cameras: More megapixels, HD Video, Wifi
Cars: Lower fuel consumption, better security features
TVs: LCD / Plasma, Brightness and Contrast, HD Ready / Full HD / 3D
2. Fashion / Trend / More modern designShape and color choices of the products
New features and gimmicks that are "trendy" right now
3. If the old product breaks1. and 2. wont work well on a lot products (Ever felt the need to get a new washing machine because the new model looks more trendy? Me neither!)
So they have to resort to 3. (Doesn't mean they don't do it for products that fit in category 1. and/or 2. tho)
Perhaps read about the
Phoebus Cartel, one of the early attempts for planned obsolescence...