These days I think they're farming it off to Android Auto and Apple CarPlay, or a simple bluetooth connection to your phone. Less work for the auto company to do, yet still a couple logos they can put on the marketing as selling features.

I'd be happy with bluetooth audio built it. My 2008 Highlander was just a tiny bit shy of the auto pipeline to receive bluetooth audio. I only have hands-free. Very annoying. Especially since at that time it was a widely-used standard, but these things take an eternity to get into the auto industry. Another reason I think some of them are fine with off-loading the work to Apple and Google.

Some of them might even realize that they suck at the in-car entertainment stuff.