we will never know!

maybe the memory management was the reason? (just a guess)

and it is easy to compress an opening library, so it takes very little space. For sure, they were counting every ply in repeated openings (if there was just one different move in it)

Or maybe Saitek was afraid, that its library was too close to the Milano/Master Chess and wanted to give them a little push compared to the Centurion?