After using carplay in the xc90 for a while I can say with conviction that the integration is a total mess. The whole "can access other functions while using carplay" is pillow talk. If you actually access an app other than phone/nav/media (which you don't need anyway when you're using carplay), it knocks carplay off of the home screen leading to an annoying/dangerous scramble to swipe over and bring it back up.
"Instead, Volvo’s new Sensus Connect platform works on a four-tile system. Each tile on the touchscreen handles a different operation: in-car navigation, the phone, media, and if the user wants it, CarPlay. Touching the tile expands the operation, but without it taking over the whole screen"
It would be far superior if it did in fact take over the whole screen or at least have the option to. This is in no way a benefit.
"Giving Volvo owners the ability to delete Carplay (or never have it installed) is an out-of-character move for Apple, which usually has stringent requirements of its partners. If CarPlay isn’t installed, third-party apps can also take up that fourth tile spot"
actually, whichever app you select takes up that spot, even if carplay is installed. It would be much more effective to have carplay take over the first, second or third tile (hopefully at the choice of the user) and leave the fourth tile variable.