Would younger viewers have harder time getting in to this show
Barney Miller was one of the few TV shows that I can immediately think of that just about always took place in a single, confined location (like a bottle episode for but the entire series). I mean there was rarely if ever a single establishing or exterior shot. And I think there were a few scenes set at various characters' homes, but nothing in between. It was kind of a big deal the handful of times they left the squadroom at ALL.
Something like that can get extremely redundant if you aren't in the right frame of mind. Watching Barney Miller on the surface (and I'm guessing that it was intentional) at least just feels like watching a three act theatrical stage play.
Brooklyn Nine-Nine is more or less, the closest thing that we have to a modern day Barney Miller. I immediately wonder how fans of that show would appreciate the slower pace, cast of veteran actors, stage play atmosphere and touch of melancholy on Barney Miller?