This has been the case for many years. Amazon has used AI in Alexa and other services for many years as primary providers, and has told it’s users it’s used it’s data for as long. We’re talking from close to inception here, so 6-7 years, at least. Hell, LLM’s aren’t even new to most big tech companies!
I’m all for privacy, but if you want privacy then you probably shouldn’t have a fucking tin can in your house that actions every conversation to a cloud service!