We had already booked a 2023 June Cruise to Alaska on Ovation when onboard a Symphony Cruise in April, and have been monitoring RCI's prices for UDP, VOOM Surf+Stream, and the KEY
The Black Friday Cruise Planner prices for above, are the lowest I've seen since monitoring.
That being said, we've never booked a Cruise only during a Black Friday Sale, supposedly their best prices of the year, for everything cruise related.