Thank you for this very detailed answer!

I was looking for a new Notebook for my parents, and they need Windows working as a dual boot and Linux as the main driver. After some research, I found that ARM for Windows was still bad, and we need it to work properly, so I discarded this option. But I appreciated the knowledge you shared with us. Thanks

But, if light bounces in every obstacle, it will be confined to just a room or so... Then, I think is unreliable for the general public and will be only useful in specific situations... Which I can't think of a single one... Not getting interference with Military, Hospitals and Airplanes isn't already achieved by separating special frequencies for WiFi and Bluetooth? How that is achieved today?

Review of Fireship.io about this topic, showing a possible surveillance use...

I wonder what is "others" in this case 🤔...