Earlier quoted context omitted.
Not only that but wireless CarPlay. I recently picked up a '23 RAV4 and I didn't think it would matter but the difference is noticeable. At least in this model it's connected before I'm even out of my garage.
I don’t understand why this can’t be an OTA update? Maybe with slightly less functionality but why can’t it just Bluetooth CarPlay?
Bluetooth doesn't support the data rates necessary to deliver the data for CarPlay. As for the "maybe with slightly less functionality" would you take no display? You're basically talking about Siri Eyes Free where you'd have a button to activate Siri on your steering wheel, but wouldn't get much functionality. But I'm guessing you want the navigation to be displayed on your screen, not just a bluetooth audio connection with a Siri button.
Basically, the 1-2Mbps of Bluetooth really isn't enough to drive a display with any decent resolution and I'm guessing that real-world data rates are a bit less than spec with so much stuff in the 2.4GHz band. Microsoft notes that you need 1.5Mbps for 1024x768 and I'm guessing most car displays are better than that today (https://learn.microsoft.com/en-us/windows-server/remote/remo...).
Maybe you'd argue that you'd take 5 FPS and semi-reliability, but I just don't think they want to implement something that's just kinda crappy. Apple doesn't want you going around saying, "wireless CarPlay is garbage." Yes, you might understand a retrofit to a car that doesn't really have the capability, but 99% of people won't. It's not that it's impossible as much as something likely to be way more pain than it's worth. Even if you want it and would be ok with the trade-off, that's not always how products work. Heck, if they did implement it and it didn't work, would you end up using tech support for it? That costs money. Would you post online where your problem-solving becomes interpreted as "Apple sucks" even if you don't mean it that way?
Worse, car manufactures might (and car dealers definitely would) start promising these models as supporting wireless CarPlay. Maybe Apple could deal with official marketing materials, but dealers will say almost anything to sell a car. People would be duped into buying these cars and then complain to Apple that their product sucks. People would be asking online "is this real wireless CarPlay or the fake kind?" The absolute headache!
You can buy an adapter that will plug into the USB port if you want wireless CarPlay: https://9to5mac.com/2023/02/27/carplay-wireless-carplay-adap.... Basically, the information goes from your phone to the adapter (via Bluetooth-setup-WiFi) and then the adapter just sends it over USB. That's way less headache for Apple and probably a better experience since it actually supports the right data rates. I haven't used one of these so you should read up if you want to buy one (or try it out and return it if it doesn't work for you), but this seems like a much better alternative than trying to jam CarPlay over Bluetooth (without WiFi).