alt Hacker NewsNot the person you're asking, but about as frequently as I replace washing machines. The fact that I'm doing it at all is the problem, especially since both machines had been "solved" by the late 1970s.
The non-electric office tools I have from that era are perpetual. Eternal.
How often are you replacing washing machines? As we had more kids, we upgraded our toaster from a 2-slice to a 4-slice, somewhere in the neighborhood of 11 years ago. Can't imagine we paid more than ~$20 for it. Still going strong today. If it lasts 10 more years, all my kids will be moved out of the house, and I suppose we could downgrade to a 2-slice model again. Unless the grandkids like toast.