I agree. In fact the yellow caliper actually says Brembo in black ink. This can be seen clearly in one of the recent Breckenridge YouTube videos when one of the vloggers has to change the left front tire of his R1T.
Maybe Bosch is supplying the braking system intelligence / ABS, but the...
To keep things easy I simply add 1 full year to whatever the latest guidance is regarding R1S deliveries. I placed my reservation in January and I know there are many people ahead of me.
If they say LE's are rolling out in Jan, 22' then I am ball parking Jan, 23' for my R1S.
If I were to venture a guess I would imagine that Amazon Music HD will be built-in to the infotainment center, or at least the app will be there by default. We already know Alexa integration will be part of the overall system.
Rivian has a close partnership with Amazon / AWS.