Great write up! I worked for a few months at a Google datacenter and a few times got to see the fiber endpoints.
Though the idea of such networks not being sold on the market makes be ponder if starlink will come to provide such a service. They’d need to scale out their laser links and ground stations.
There are hard physical limits on how much bandwidth Starlink can provide to do with spectrum allocations, so it will always be a somewhat boutique service and indeed prices for end users might end up climbing as word spreads and demand grows. They already practice regular dynamic pricing changes depending on demand within a cell. It doesn't make sense for corporate backbones.
Though the idea of such networks not being sold on the market makes be ponder if starlink will come to provide such a service. They’d need to scale out their laser links and ground stations.