See also 802.11ax Routers.
Bettercap is a great tool for performing reconnaissance and attacking WiFi networks, Bluetooth Low Energy devices, wireless HID devices and Ethernet networks. Github
The 5GHz spectrum is fast, but it can take a long time to broadcast due to radar detection. Article
6GHz opened up in 2020 so it's worth holding out for Wifi 7. Article
Wifi 7 is expected to be standardised in 2024. Wikipedia
I want to swap our home network out for Wifi 6 (802.11ax) which should allow for many devices across both 2.4GHz and 5GHz radios.
I'd really like this to use OpenWRT because I've found it to be the most reliable base for a network. Most other routers are in a race to the bottom for price so they're not that great on the software.
The OpenWRT forum has a discussion on 802.11ax routers. Thread
One piece of advice in that thread is that "anybody who doesn't know what they are doing, development-wise, should wait until this thread gets filled with replies clearly indicating what AX routers are being supported and what people are buying the most. The more popular, the better the support." Comment
There are a few filtered lists on OpenWRTs Table of Hardware (TOH) that are linked to in that thread. Filtered TOH