My counterargument is that Tomahawk LC (the third generation LCs referenced by parent) are just NP5 and Mellanox just picked up EzChip. I imagine you'll see whitebox competitors targeting large swaths that use ASR9K for the datapath resources it provides (perhaps Mellanox will even build this box).
Others, such as in my particular space, were previously forced to ASR9K or similar for scale reasons (because scaling full tables is hard when you need capacity too), but Broadcom's Jericho chips hit the scale mark with added TCAM, kicking us from $200K-ish/PoP for barely meeting needs to $60K/PoP way over provisioned in the case of NCS5501 or Arista 7280R. Of course, there are caveats to how this works out, but good enough is good enough!
Customer mix is important for margins. SPs, for example, are notorious for getting bottom dollar deals for their scale and ability to play the other side. And sure, they need the feature set of ASR9K. But when the rest of the mix (higher margin) looks around, they see that the scale promises are unnecessary for their operations and move on to lower cost boxes.