You mean how one washing machine lasted decades, without needing intervention? Or how simple appliances like electric kettles lasted for 15 years, then needed an element replaced to be good for another 15?
Cars might have been less technologically advanced, but they were also easy to fix, because they were so low-tech. I'm a total dummy when it comes to fixing cars, but I managed to replace a head gasket without any trouble.
I'd say the idea that life was "worse" 40-50 years ago because we have better tech is bunkum.
Things were made to last, not wear out in 3-4 years.
And there was virtually nothing made out of plastic. Drinks came in glass, groceries in paper and toys were made of metal.
You say that like it's a bad thing.
I happen to think the exact opposite and even have a thread somewhere that the internet is the worst thing ever.
The trouble is, with the population having doubled since 1969, we cannot turn that clock back and return to sensible, sustainable living.