I suspect FOSS will converge/create a best-in-class harness within the next 6 months or so. As will most (all?) software, the FOSS stuff somehow always ends up being way better than the closed source stuff.
Really just feels like endless FOMO with how fast the iteration cycle is for harness and model development.
I don't think it's very good though. As an example I can use one CC instance to delegate to several to achieve complicated/open-ended goals.
That just isn't possible with other harnesses, and it's definitely not benchmarked.
With that said I think Codex/Kimi code are all behind CC as well, so maybe it's a question of effort and not the model.