> At something like $1000/port, for 100 Mbps symmetric broadband customers that's $10/customer divided by the oversubscription ratio, per hardware refresh cycle (say three years). The percentage of the customer's monthly bill rounds to zero.
If you're only building enough active equipment to support 100 mbps service, then your point about sharing capacity on the fiber itself with RF TV is entirely irrelevant--you've got nowhere near enough active equipment to exceed the capacity of even a single pair of wavelengths.
Compare that to something like Comcast's Gigabit Pro. Each user gets their own port on a 10G aggregation router. The CPE is a Juniper ACX-2100. And you need a beefy router after that to do traffic shaping. (Due to the way the traffic policing works, Comcast will happily deliver 25MB at 10 gbps before the policer kicks in, which completely overwhelms any consumer router you put after the Juniper.) That's thousands of dollars per user in active equipment--and you're still using just a single pair of wavelengths.
> It just seems like the opposite of how everything else is going. Virtualization, SDN, etc. Get everything running on the same kind of hardware so everything is fungible, failed hardware can be swapped out with universal replacements, idle resources can be reallocated to other workloads without changing hardware, etc.
There is nothing cheap, simple, or reliable about SDN. Flexible yes, but not those other things. It takes enormous amounts of hardware to, e.g. build an SDN switch with VPP that can compare to a $1,000 Juniper 10G switch.
RF over Glass is super easy and cheap. You get a feed from a head-end, and you inject it into a passive fiber network. There is no IP, no routing, nothing active in the delivery network until you get to the CPE.