What's really baffling is how this is a problem if he just wants to use his laptop or something? Like 5ghz is everywhere these days.
Not everyone has 5ghz laptops.
And not all IoT is 5ghz. The spectrum is free to use, so I'm incredibly unsympathetic to him.
Going to be easier to buy a 5ghz usb than fix someone elses flooding.
Or sometimes even nicer with replacement of PCIe/M.2 WiFi card.
True. Replacing the wireless card with a modern wifi 6 card is trivial and not particularly expensive either though.
5Ghz doesn’t work well in a lot of houses. Weird geometry, thick walls, etc.
I live in an old, three story brick house from the 1930. It's small, 100 m² (1075 sq.ft.). The 5 GHz from my Airport Express can barely reach the kitchen. My solution is to put additional APs in the house, but with low transmit power. I use 25 mW personally. But then again, the chances that the neighbor will agree to this, are slim to none.