What do you mean? These coding leaderboards were at single digits about a year ago and are now in the seventies. These frontier models are arguably already better at the benchmark that any single human - it's unlikely that any particular human dev is knowledgeable to tackle the full range of diverse tasks even in the smaller SWE-Bench Verified within a reasonable time frame; to the best of my knowledge, no one has tried that.
Why should we expect this to be the limit? Once the frontier labs figure out how to train these fully with self-play (which shouldn't be that hard in this domain), I don't see any clear limit to the level they can reach.
Whether an individual human could do well across all tasks in a benchmark is probably not the right question to be asking a benchmark to measure. It's quite easy to construct benchmark tasks a human can't do well in that you don't even need AI to do better.
What field are you in where you feel that there might not have been any growth in capabilities at all?
EDIT: Typo