I had a collection of DEC LSI-11 technical/troubleshooting links captured in 2021 when I last was working on a young PDP. When I checked them again in 2024, more than HALF were gone, but (praise be to Kahle) all had been archived.

The saying goes: "when an old man dies, a library burns." Doubly so when his heirs don't pay the hosting bill. The boomers and previous were great at writing things down, but we're rapidly losing them.