> Mesh networks can use Ethernet as backhaul and they can also use dedicated radios on 6GHz band for backhaul. I’m using a mix of both (still have a couple I need to run Ethernet to) and it’s fantastic.

I wouldn’t recommend wireless backhaul to people who have bad experience with WiFi. Some people have bad WiFi because their (older?) buildings have problems with wireless in general: I am not saying they live in a faraday cage but still their if their WiFi isn’t great, wireless backhaul won’t be either. Go wired if you have a choice.