*Sigh*
If this was any other developer, I'd interpret this as saying 'We're cutting the main storyline in half.'
But this is CDPR, and I bet they mean "Witcher 3's main campaign was 60 hours, so CP2077 will be over 50 but shorter than 55 for most players."
I'm not going to rush through the game, just doing main story missions to get to the ending. I'm going to 'stop and smell the roses' of this world by beating every side-mission I come across.
And its going to be very replayable, with the three class-based prologues.