Most archives - the ones in libraries, etc. - are not published, except they are available to qualified people who physically travel there. Most are not even fully indexed - nobody knows all of what's there.
My perspective is compatible with this fact. An archive that approximately nobody can access and/or nobody knows what it contains has no value to society at large, except the potential that it may some day be published.
The good news is I'd guess the number of (nonreligious/nonproprietary) institutionally managed pointless archives is dwindling.
