You could easily process the audio and filter in on the device and just send the transcribed parts that match your filters for further processing. No need to send a constant audio stream. Eventually it would show up in the battery usage but things like the google song recognition also heavily use the mic and process audio and it doesn’t show up as heavy as you would expect.

What i love about musk is that he is the best bad example. Maybe someday he’ll start a war with some country and then people will start to understand that no single person or group should hold this much power. Because there are also a handful of other people and groups with the same resources who choose to hide in the background.