LLM's went from generating incoherent garbage, to weird text that seems coherent but isn't (gpt-2), to what we have no with agents passing some of the hardest benchmarks, necessitating benchmark development just to be able to keep up with the rate of progress. They did this in about 5 years.

The sheer rate of progress is what is meaningful. If LLM's agents were frozen now without any further improvement, your position would be must more defensible. But that's not what's happening, we are getting breakthroughs almost on a weekly basis.