Agreed. Extremely important on rental cars.
Car makers make money selling cars. Which buyers happily pay five figure suns for. An executive can add to the bottom line by raising sales prices/volumes with a more competitive product, or lowering component costs.
This isn’t some weird social media business with non-paying users and a reliance on ad money.
Getting all my information - calendar, maps history, music, contacts, etc. on a rental car without syncing that info to it is absolutely great.