I went in for my annual intermediate service on a 2016 Turbo (60Kmiles/6Years service with 51K actual) and dealer recommended immediate action to replace both front and back rotors and pads (3 to 4 mm left) and they are really good at taking pictures and then showing me actual parts after they have been removed so it did not look good to me (I am no expert) so I agreed to it.
Here is the cost breakdown:
Front Labor: $350.00: (2hrs x $175)
Front Parts: $755.78: Brake Disc (2 x $199.85), Wear Indicator (2 x 34.08), Pad Set (1 x $271.20), Screws (4 x 4.18)
Rear Labor: $350.00: (2hrs x $175)
Rear Parts: $519.86: Brake Disc (2 x $144.15), Wear Indicator (2 x 16.28), Pad Set (1 x $199.00)
Interesting enough that the labor for the 60K service was $560 labor (about 3.25 hours) and $175 in oil/filter, pollen filter, sealing rings.
So very expensive 6 year (50k miles) appointment but I am overall happy that it took so many years/miles for the first brake/rotor service.