Most definitely not. I doubt there is a single person at OpenAI that knows and controls the whole stack. Changes happen at many layers, ChatGPT UI, API Gateway

Most definitely not. I doubt there is a single person at OpenAI that knows and controls the whole stack. Changes happen at many layers, ChatGPT UI, API Gateways, moderation API, backend server hosting model, the model file itself, etc. Each of these components is changing pretty regularly it seem. The end result of combined changes for users is being the observed degraded performance of ChatGPT.