You really do no understand what Google is doing or how it works. The article does a poor job explaining. It is more like a virtual circuit switch networ

You really do no understand what Google is doing or how it works. The article does a poor job explaining. It is more like a virtual circuit switch network. It enables far less cost in equipment as no need to over provision. But a key feature is it makes latency far more determinate. This was necessary to make Spanner work.