Update: As my trip went on, sending text messages with Siri on wireless CarPlay seemed to work better. After switching back to wired CarPlay on my own car, it works flawlessly. So I don't know. Is wireless CarPlay just flakier WITH iOS 27 than it was with 26? Is it flaky for some period of time after an update while the dust is settling? Something else? Either way, I don't have the mental stamina to even think about it. But the whole experience was indeed nonphenominal. 😂