And yet my android phone is able to detect what song is playing 24x7 without being a noticeable drain on the battery or using extra data. Doesn't seem far fetched to be able to do keyword spotting under the same constraints.
Here's one example of a company getting caught: https://m.economictimes.com/news/international/us/next-time-you-talk-on-your-phone-be-careful-facebook-and-google-are-listening-to-your-conversations/articleshow/113071827.cms
I have 20 years programming experience and C# is one of my favorite languages. It feels so expressive and doesn't get in your way nearly as much as Java does. I feel like I'm writing the code I want to write instead of writing the code someone from 30 years ago with a fetish for boilerplate wanted me to write.