I’m not sure if they updated the website after I purchased it, but now the blurb for the Unifi Express says this:
Manages up to four additional UniFi Network devices when operated as a gateway
I have more devices than that, but still, it was literally not functioning with what I had. I also loaded my whole system backup including all historical data. That may have been the other thing that just killed it.
I want to add that in many places in the US it is not just the distance, but the danger and outright discouragement of walking somewhere. For example, I contemplated using a train to get to Lego Land in California from Oceanside, California. After getting off of the train I would have to walk 1.3 miles, which is only a minor inconvenience. However, after reviewing the walking route google has this qualifier: “Use caution - may involve errors or sections not suited for walking”. This prompted me to review the walk using street view and I came to the conclusion that there was not a safe route.
This is just one example of something that I think should specifically be available. There are many places where walking is encouraged and convenient, but it is by no means universal.