Just another data point, since my node has been running bmon for almost exactly 1 week. With 512 connections, it's had a throughput of 2.49TB. The router is a VM on the same physical machine and has a total throughput of 72.26TB in the same time.

I think the competition for deploying gigabit fiber is going to outpace the demand for block space, especially if lightning and segwit get activated.