I guess? I'm surprised that the original model was on equal footing to the user prompts to begin with. Why was the removal of the origina training a feature in the first place? It doesn't make much sense to me to use a specialized model just to discard it.
It sounds like a very dumb oversight in GPT and it was probably long overdue for fixing.
Because all of these models are focused on text prediction/QA, the whole idea of "prompts" organically grew out of the functionality when they tried to make it something more useful/powerful. Everything from function calling, agents, now this are just be bolted onto the foundation of LLMs.
Its why this seems more like a patch than an actual iteration of the technology. They aren't approaching it at the fundamentals.