That’s a very interesting site, thank you!

It looks like the screen size is the most identifying info for me, followed by the webGL hash. Not much can be done about those on mobile right?

You have to be pretty close to sniff Bluetooth data though. So fine at home, less so in a busy public space. (The chances of someone there trying to hack your Bluetooth is still astranomically small)

… I assume they have both the phone and laptop with them when they are away from home?

In that case, the entire windows ecosystem collapses when Microsoft messes up windows defender… at least if its spread out it hurts less people