Bandwidth engineering, like Bruce said, was religion for some people and anathema for others. It saved at least one company from bankruptcy, letting them run the network they had much hotter than IP would have.
FRR, though, was an absolute game-changer. Local protection to failure and sub-50ms (often sub-10ms) protection switching in an IP network? Immensely valuable. Link connectivity protection was easy to deploy and I will argue made a massive difference in an Internet network's ability to provide real-time services in the face of failure. Node protection and bandwidth protection? Less so. But MPLS-TE-based FRR was the first local protection mechanism that didn't require you to have a specific topology and which could cover 100% of all connectivity failures.
I'm surprised Bruce didn't call out this distinction, because they really are two separate things using the same underlying tech.