At the bottom of the link you posted is the following:
> The information on these pages comes from a variety of sources, especially old IBM documents on bitsavers.org, as well as information from the IBM 1401 restoration team, especially Tim Coslet's SMS data and Jim Hunt's data. Images courtesy of Randall Neff, also rolyath and maisorbus. ...
That's definitely a shared experience with many birds of the same feather. The IBM 1401 restoration team is pretty famous, with public demonstrations.
It could be completely one-sided. It could be a labor of love for something that was important to the OP but which no one else would ever care about. (Marathons in every country.)
Or it could be useful for a future historian trying to puzzle out some aspect of history.
I am at best an amateur historian of my field. I am trying to understand how changes in computing technology from the 1950s-1980s affected how people thought about certain problems. Almost I have to work with is published or archived papers. Some of the clues I have to work with are oblique, like combining an oral history made 20 years later with a footnote in a paper, or using advertising materials ("can support over 10 million molecules") with records of the hardware of that era to estimate the amount of memory needed and the storage cost per molecule. Someone from that era would have known it on the top of their head, but it's not information I have. I've even contacted the archivist at the Charles Babbage Institute because the information I wanted was only available there.
As a result of this work, I now want to reproduce a 1950s era manual punched card system, to get a more visceral feel for that era. The book "Punched Cards" is invaluable in explaining the details, but putting things into practice sometimes makes it easier to understand the details. (Buying punched cards is almost impossible these days. OTOH, now we have stencil machines, which might be able to automate the production side for me.)
I can easily believe that some future historian of the 1960s era computing center will want to understand aspects of how the hardware works. I am not a hardware expert to guess what that might be, but it's pretty clear that other fields find interest in the historical development of their field, like clocks, engines, ships, bridges and buildings, and study old systems for an understanding or appreciation of certain problems. I've no doubt the same will be true for computing hardware.
It's hard to know what people in the future will want. Watch videos of Jason Scott ("Rogue Archivist" for the Internet Archive) to get an idea of how some of the ways assembled and archived information is used, like "Rescuing The Prince of Persia from the sands of time" or "So You Want To Murder a Software Patent".