All of them, without exception. Just recently, Sprint sold their fiber business for $1 lmfao. Or WorldCom. Or NetRail, Allied Riser, PSINet, FNSI, Firstmark, Carrier 1, UFO Group, Global Access, Aleron Broadband, Verio...
All fiber went bust because despite internet's huge increase in traffic, the amount of packets per fiber increased a handful of magnitudes.
All fiber went bust because despite internet's huge increase in traffic, the amount of packets per fiber increased a handful of magnitudes.