How can this "micro trenching" possibly work?
Whether they put it 2" deep like they tried and failed in Louisville, or 6" deep like they say works great elsewhere, this seems like a huge problem. Because they've got to patch the road where they tore it up, freeze/thaw cycles are going to create the edge of a pothole there. Potholes can easily grow to 6" deep...
Even ignoring that, what happens when they need to do some minor work on the road, like tearing up a small section to fix whatever utility they need access to. If the fiber goes through it, does Google come out and reroute the fiber around the work area? Or is your neighborhood just down for a couple days until the work is finished?
There's a reason the only utilities routed under the street are WAY under the street, and wires are either run through a duct deep under the street, or in the median. If I saw a company doing that around here there's no way I'd sign up with them. Maybe in a place where it almost never snows like Austin it would be OK, but in most of the US freeze/thaw cycles are a real thing and these microtrenches are a problem waiting to happen.
But hey, Google doesn't care. They will probably end Google Fiber before long, just like they unceremoniously drop 2/3 of the products they start.