I mean Open AI has the incentive and history of hyping it up. And the general rule the last 20% would take the same amount of time as they got the first 80%.

But having said that, it is getting ridiculously good and plenty of people find enough value out of AI as of today. In terms of hardware we already knew what the next 3 to 4 years would be like. There seems to be enough work on optimisation to further enhance the model.