CarPlay/Android Auto doesn’t require a modem in the car. Your phone already has a modem in it.

I have yet to try these new Shimano derailleurs, but reviews I have seen seem to indicate that that amount of chain slap is a definite step backwards.

I am inclined to think that the damping added to the suspension system by a derailleurs is fairly minimal compared to the actual forces involved, and worth the trade-off for systems with a reasonable amount of chain growth.

Anyone know what the heck the Pozidriv/Round Hole combo is for?