Technology

I don't think that most of the big tech companies are listening to your microphone (I'm not ruling it out entirely, and I'm certainly there are some smaller sketchier companies that are doing it)

But I think most of the time most of the time they don't need to

They know what ads you've seen on your phone/computer, what you've been googling, the websites you've visited, where you've used your credit card, what shows and movies you watch, and where you've been (from gps locations, or from what wifi networks and Bluetooth devices you've been near or connected to) and what ads, playlists, stores, products, etc. you were exposed to while you were there, and of course who you talk to and all of that same information about those people.

That's all going to influence the things you think and talk about, they probably have a pretty good idea what kind of conversations you're going to have well before you do.

And don't get me wrong, that's creepy as fuck.

I think most of it comes down to people not even realizing how much data about ourselves we put out there and all of the ways it can be collected and used to build a profile about you.

And honestly I think they can probably get better data from that most of the time than from trying to filter out background noise and make sense of what you're talking about through your microphone.