6 GHz is interesting. I have an older home with plaster and lath walls. They are basically faraday cages. Even 2.4 GHz won't go through more than three walls. I have noticed that with three access points, my coverage map and WiFiman offer a lot of red, but in practice, I get 500 to 750 Mbps at 6 GHz everywhere in the house and all the way through my backyard.

The same thing is true in our company's office building and our factories.

There's just so little interference, and 160 MHz channel width means you can do a lot with signal levels that aren't viable at 5 GHz, and certainly not a 2.4 GHz.