If literally solving the entire field of natural language processing and recently most of computer vision with GPT4V doesn't count as mind-blowing for you then I'm sad to say that I really doubt anything would ever convince you.
I think it was pretty visible a few years ago, but not 10. And I think there is a lot left to do in both areas, but the jump in NLP capabilities is significant.
Yeah I mean technically GPT 3 was already out for a while and looked impressive, but it was still only accesible to like 10 people and it was difficult to tell if it fell flat outside prearranged demo examples.
In fact given what we know now, it likely wasn't nearly as good as it looked. So was hard to say at that point if this whole language model thing will pan out or become yet another useless learning approach that's unfeasible to apply to anything.