True, although Apple doesn't build cars (yet) so if they didn't licence CarPlay to car makers there'd be no CarPlay at all. As for sub-woofers you're correct of course. As good as it is, the OG HomePod doesn't compare to a sub-woofer. I'd buy one if they made one although I'd prefer to see Apple add minis as rear speakers to Home Theatre mode first. Maybe they're planning to introduce a sub and mini rears along with an OG replacement all at the same time. We can only hope.