It is well known that GPT-4 is downgraded because of GPU capacity. They ran out of GPUs to even train new models on, hence downgraded the consumer version of GP

It is well known that GPT-4 is downgraded because of GPU capacity. They ran out of GPUs to even train new models on, hence downgraded the consumer version of GPT-4 to free up GPU resources. 'refining and improving' skills doesn't particularly matter, because they could have just continued to serve the frozen GPT-4 0301 version without any issues, if they weren't forced to downgrade GPT-4.