So at home I have 3 Ubiquity APs. My house is long and the APs are setup X-X-X on the center line of the house (for the most part). 2.4Ghz is used only for IoT. 5/6Ghz is used for everything else. My house sit on a large lot. I can still see ~50+ other networks around me. The worse part is that there are 2.4Ghz networks that are set to 40 wide channels and 5Ghz networks set to 160 wide channels. People have zero idea what they are doing, and the defaults from the manufactures are junk. Every AP around me is screaming as loud as they can because people seem to think turning up the power makes it all work better.

The only think I want from the the next version of Wifi would be some sort of technology where all the APs in the area can agree on what they see and optimize so they stop stepping on each other.

In my case through careful site surveys and planning, I have a pretty stable network even managing to have useful 40 wide 5Mhz channels. The radios are all tuned to use the least amount of power possible. One thing also to share, if you plan on using Matter/Thread be aware that some of the channel will overlap with your 2.4Ghz networks. If you are using Apple kit for your border router its is locked to channel 25 which will have overlap with your 2.4Ghz channel 11. My Thread network became very stable when I switched my 2.4Ghz to use only channels 1/6.