That's not what he said. The complete message was:
So I wanted to be clear about something, although the server is on its own depot, the code base does in fact stretch across all games. So there are possible code changes that could also be updated on the server. For example, a security update, well obviously you would get that, etc. So there are possible code changes that can and will effect the new Origins server, so its not 100% immune to live. However design side, updates for live should not effect the Origins Server. Will pin this.
The emphasis is mine. The Origins server will share some backend systems, and that makes sense. It needs to talk to the current authentication system, the code that manages zones/layers, etc. But the zone maps, resources, scripts, itemization, quests, etc. are isolated from one another. It doesn't mean that it's going to just be another variant of the live servers that are level-gated like the current TLEs.