I have a couple of older Google wi-fi points. I replaced the network they created with a mesh router and points, but would like to add the older units back in as additional points. When I plug them in, however, the Home app never shows that they connect. The lights on the older units come on as blue, and flash slowly, and ultimately turn to orange, which I expect means they never made a connecting to the Nest router. Not sure how to get the Nest network to recognize the older version units.
When you set up the new Nest Wifi network, you made a new network for them. For the oldtimers to join, they must be factory reset and added to your new network using the Google Home app. Make sure you try to add them to the same Google Home home network, using the same Google account that set up the Nest Wifi pucks. More info:
Too many devices can result in worse performance, due to interference etc. So more does not neccessarily equals better.
I'd also recommend using ethernet cables as much as possible. A.k.a. "wired backhaul".
I probably will later. I did a factory reset on the Google points at home, away from the Nest network. When I took them back and tried to install them, they showed up in their original configuration. This makes me think that I need to take down the Nest network, do a factory rest on ALL of the units, and start over again from scratch. Does that seem like the logical\] course?