https://arstechnica.com/gadgets/2019/10/google-defends-its-use-of-wi-fi-5-in-nest-wifi/

Google's new Nest Wifi is notable largely for two things—having a built-in smart speaker and digital assistant in every node and not using the newest Wi-Fi technology at all.

We still don't know exactly what chipsets are used in the replacement for Google Wifi; Google's not telling, and the company has submitted confidentiality letters to the FCC that kept it from needing to release photographs of the devices' boards for now, as well. All we know for sure is that the Nest Wifi Points are AC1200 (like the original Google Wifi) and the Nest Wifi Router is AC2200. Consumer AC speed ratings are largely bogus, but this should translate into one 2.4GHz 2x2 radio and one 5GHz 2x2 radio on the Points as well as one 2.4GHz 2x2 radio with two 5GHz 2x2 radios on the Nest Router.