I've long thought that there aren't many others -if any- still operational...maybe one that controls the power distribution and/or one that has the real people in charge...
It is nice to have a firmed up scope of how long they've been going, but it's still probably debatable-- IF the memory drug is actually what they claim it is. I will assume the working dates are gospel now, though.
It was more of a split episode, which was much smoother than the earlier ones, as far as transitions and overall advancement of the story.
Bernard was finally given a break by figuring out Walker...
The end reveal in 17 was NUTS!! Someone else was actually lurking around still?!?!