It was designed to be absolutely as silent and non-reverberant as possible in order to allow total freedom of additional reverbs of any kind. This is its great value. It adds almost no color or ambience to the recordings. The fact that it can be scientifically analyzed in a lab as having "reverb" that is barely detectable by the human ear doesn't translate into what one hears in a simple musical sense, which is a totally dry sound. The proof of this is that no one ever uses the Silent Stage samples in an actual performance without adding some kind of reverb - they would sound far too dry. But this allows any kind of reverb from hardware to MIR to Moog analog delay to be used.
Exactly👍
This is what I meant by flexibility. Thanks William, you've crystalized my thoughts quite eloquently here.
Let's not forget that creating a sonic environment can be an art form in itself.