While it is interesting that they achieved a technical feat, is there any reason for this article to be here? It teaches us nothing apart from the fact that Cloudflare did a thing.

That's basically what all technical blogs from corporations does. I suppose they imagine we'd learn something it.

I concur with the other commentator, bit disappointing it's not OSS, guess they are afraid of helping the competition. I did expect a "and you can give it a try here" section in the end.

Open sourcing something has a cost and we mostly only open source things like stand-alone libraries. We also mostly open source things that are fairly mature because it's hard to manage software that's rapidly changing internally and handle PRs from outside.