They represent a small share of the auto market though. Most automakers include it, at least from what I've seen. EV or ICE should be irrelevant for something like dependable audio feeds.
Do Tesla and Rivian have better connectivity, or do they suffer frequent drops too?
I'm very glad that Lucid added Android Auto (as most automakers do). It's been a godsend as a workaround the native problems.
I don't find Tesla and Rivian to be the sole alternatives. Ford, GM, Hyundai, Kia, Toyota, Porsche, Audi, VW, and many others make up the bulk of the auto market.