What exactly they're doing with the archive isn't stated. The FAQ doesn't explain, other than vague intentions to have the ability to do research and possibly some sort of museum (I think?)
Their Library Director Phil Salvador is a serious historian, who extensively researched, interviewed people, and wrote a comprehensive deep dive into the history of Maxis's serious games division, Maxis Business Simulations, John Hiles, and SimRefinery.
It was such an widely read, well received investigation, that it led to the recovery of SimRefinery when a reader discovered an old floppy disk of it that had been sitting in a drawer for decades!
https://archive.org/details/sim-refinery
https://gamehistory.org/library-director-phil-salvador/
https://gamehistory.org/ep-11-simrefinery-simulated-by-a-ref...
https://obscuritory.com/sim/when-simcity-got-serious/
Has a large collection of old systems and games, magazines and anything else they can get hold of. It's also open to visitors.
That is two museums. It's in the title: "Hands-On Vintage Technology Museums" and mentioned all over the front page.
Quite a long trip for many. That seems to signify that they're not a large enough organization to be an archive.
Personally, I think there should be a non-profit that works with non-profits like this, computer and console equipment museums, Internet Archive, and a spacefaring company to ensure that history is protected in a logical way.