I'm 77. My two sons are 58 and 54. I don't remember the year I bought my first microwave, but it was probably in the 70's. I bought it from Sears. It was a big old thing, heavy too, but that darn thing lasted 15-20 years. One time it stopped working, so I took it to a small appliance repair shop. He put in a new fuse for $5.00, and the thing lasted until I got tired of having to move it when me moved to a new apartment...so I got a new, smaller one.
Ours was from Sears too and it was huge! We didn’t really know what to use it for at first. I remember making baked apples in it.
My father was an electrical engineer. We had one as soon as Amana hit the market late 60s, IIRC. Same with color TV and cable.
My father also built his own computer from plans he bought from an engineering magazine. He died in the early 80s.