Sure, I said nothing to the contrary. It's a minor simplification to call it a reverse proxy. The proxy is built upon a very deep investment in infrastructure, take all of the cert signing stuff, for example.

Most BeyondCorp concepts seem simple, and they are, but they depend on a lot of existing machinery, almost all of which is non-existent in pre-existing corp networks. The average tech company is currently struggling to catch up.

My point was that it is simple from the POV of the app developer. See the comment I replied to.

Do you notice all the different components on this page? https://beyondcorp.com/ There are a lot more components and concepts than just an OAuth proxy. A web developer may think it's all very simple from their perspective, but it goes much deeper.

I know on great detail the implementation and what went into it.

My point was it is simple for an app developer to integrate with.