1) Why uncloak it? I am as curious as anyone else, but if they’ve kept it secret for this long, why make it public? The answer can only lay in politics.
2) the air force will never buy 100. That’s what they said about the B2 and they stopped at twenty.
Why uncloak it now? My guess is, a message to Putin (the Chicoms probably already have the plans anyway).
But if I had a stealth bomber I wouldn’t uncloak it at all.
They usually reveal things once they are obsolete - so maybe we are completing the transition away from piloted aircraft.