The Roobeeverse is literally so boring right now - as some of you mentioned here, she's probably conflicted about filming a Christmas haul as she knows the video will be discussed (and could possibly get torn to shreds) here. Maybe she's decided to take the much-needed social media break without telling anyone? That would be c r u e l of her, but I could see it. She's probably following this thread as we speak and laughing at us naïve tattlers.
I also wonder what she's going to release New Year's Eve-wise (another "organize your life with me" video? "how to be kind/more like me in 2022"? come on, surprise me, Ruby). And I wonder if she's planning to do a Master's (I don't think she's quite ready to say goodbye to her cozy academic life just yet) - that could make a good topic for at least a few future videos, I wouldn't worry about it. The YouTube burnout is showing, though.