Love it when the kinda half-formed observations you make about an episode finally come to the forefront.
Watching the start of "Dot and Bubble": Hmm, everyone in this episode is very... white.
Halfway through: The Doctor certainly continues to stand out, especially in that bright red sweater amongst all the pastels
Lindy freaking out about the Doctor and Ruby being in the same room together: I suppose that could be due to some cultural taboo about interacting in-person when everyone is supposed to communicate via bubble, but that doesn't track with what we've seen of her work day...
The "twist" that the chronically online, all white, super rich, entitled to the point of satire, willing to sacrifice others without hesitation, oh so eager to colonize people living in a literal bubble (TWO bubbles) are *gasp!* actually, devastatingly racist...
Yeah, that's not a twist. That's all deliberately interconnected. The episode didn't suddenly move from an argument about social media use to an argument about racism; the two historically go hand-in-hand.