[johncolanduoni]

Investment in dark fiber was intentional and continues to this day. Almost all of the cost for laying fiber is in getting physical access to where you want to put the fiber underground. The fiber itself is incredibly cheap, so every time a telecom bothers to dig up mile upon mile of earth they overprovision massively.

The capital overhang of having more fiber than needed is so small compared to other costs I doubt the telecoms have really regretted any of the overprovisioning they've done, even when their models for future demand didn't pan out.