There has always been the myth/rumor/belief that our devices are always listening. I wonder if this is an overton window moment, get people used to a device actually listening and slowly move to all devices listening.
The myth is that the devices are streaming audio back to be ingested into ad/recommendation algorithms, which is testable and generally not true.
I really wish these conversations would shift to the scarier truth: companies collect so much metadata on everyone that they can make pretty good guesses without processing what you're saying.
If you think "oh hey I was just talking about socks, how did they know to show me an ad for socks" it's likely because they accurately predicted based on your behaviors that you are highly likely to be in the market for socks right now.
Our devices are always listening, if you have them set up to listen for hail words like "Siri" or "Hey Google," so I think the Overton window on listening already shifted about 10 years ago. The device actually recording/transcribing what it hears is newer, but you're right that it's becoming more and more normalized. With Granola, I think most people assume that any video call is being transcribed, even if there's no indication in the meeting.
Whatever side you come down on, privacy doesn't stand a chance against a small amount of convenience.