Anyone care to explain what the Google WiFi mesh network is, I've never heard of it?
In a traditional setup a home has a single wi-fi access point (AP) to which all wi-fi devices connect. If you get too far away from the AP the signal can get too weak and you'll lose your connection. In this case you can add another AP and configure it as a Repeater. Instead of being its own network, your device will connect to whichever AP has the best signal. Switch-over between them can be slow and there will sometimes be a momentary connectivity loss during the switch. In both cases (a single AP or an AP and Repeater), the idea is to have a really strong signal that covers a lot of area. This can become something of a battle-ground though. You have your AP in your living room and your neighbor has an AP that is close to your bedroom. You find out that your connectivity isn't great in your bedroom (because of unintended interference from your neighbor's AP), so you setup a repeater. Now your neighbor loses connectivity in some places and has to setup their own repeater. The circles of interference just grow in number and size. For home use, it starts getting complicated to have more than just one AP and a Repeater, too.
A mesh network is very similar, but it sets out from the beginning with the idea being to have lots of smaller and more intelligent points of connectivity spread throughout your home. Each point figures out the best frequency on which to operate to provide the best service. All of the points work collectively to give you the best possible experience throughout your home. The mesh network, theoretically, is less susceptible to interference from neighbors and also less likely to cause interference to neighbors. They should also generally be easier to add/configure and less expensive.
https://blog.google/products/google-wifi/making-mesh-your-wi-fi/?hl=en-USThe most probable reason the PID is incompatible with mesh networks is because Google Wifi creates a single network that uses both 2.4 and 5GHz bands while the PID can only connect to 2.4GHz networks. It's really a case of Auber being quite behind the times... there is really no excuse for them not supporting both 2.4 and 5GHz. It's the equivalent of buying a TV today that doesn't support HDMI connections.