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.
We write things up for one main reason: find new employees. We want people to know what sorts of things we work on. So we try to explain them in a lot of detail. A secondary reason is that it's sometimes helpful to learn how someone else solved a problem. Real world examples can be helpful and sometimes more helpful than abstract discussions.