Hey thanks for the feedback. We've taken your points onboard, with a few tweaks to the piece and also for food for thought in future.
The thrust of our argument was that more and more traffic is going into the hands of a smaller number of network owners, which isn't great for resilience, for one thing.
Also, if we end up in a situation where 90%+ of traffic ends up in Google, Cloudflare, Amazon, Microsoft, Akamai, etc, pipes, what happens with standards? Might be a bit less IETF and a lot more GAMCA. Maybe we're worrying about nothing, maybe it's worth putting it out there. We went with the latter.
Also, re: CDNs. Sure, you don't have to use one or you could build your own. Much like if you don't like using DHL or FedEx, you could ship something literally yourself. Or if you don't want to fly BA or AA, you could get your own plane, pilot's license, and fly. There comes a point where you need a site-protection service that's cost prohibitive for you to build.
You mentioned other anti-competitive stuff, which is valid, but beyond the intended scope of this article.
It's a comment piece on this particular part of the industry.