The reason 6Ghz was introduced with WiFi 6E and 7 was because 2.4Ghz and 5Ghz was very busy.
My question is why isn’t there anything in between? Why isn’t there a 3Ghz, 3.5Ghz, 4Ghz, etc?
Also, what if things that require very little data transmission used something lower than 2.4Ghz for longer range? (1Ghz or something?)
Indeed, the regulation authority, e.g. the Bundesnetzagentur in Germany, will knock on your door and inspect your radio and wifi devices. That way, some years ago they’ve found a malefunctioning radio alarm clock in my area.