This is dinosaur think. If you need it it’s online. There is no way the LSC library archives have anything that the world needs that isn’t digital. There may be some local history stuff in the old Fiche files, but I was a history major at Lyndon 15 years ago and NEVER used the library for anything other than library of Congress book exchange, and that was 15 years ago when eBooks were just starting out. I could at the time get primary sources online in almost every case I needed them. The last 20 years of you and I solving captchas to verify we are not computers has allowed digitization of countless primary sources.

Last point is that we are talking about LSC, JSC, and VTC. This isn’t Harvard or Yale where their may be donated collections of important things that may only exist in that place.