I have no idea how you'd quantify that, but they're pretty good already. At least in the hands of someone who knows what they're doing.
I share everybody's concern about many aspects of LLMs; copyright, data collection, energy use, component prices, not to mention what it does to us: outsourcing our thinking, dependency, slop. And I don't entirely disagree wanting to limit that.
And yet, I have just written a library that I was planning to put on Codeberg, but I've used a lot of LLM assistance for it, because it's simply too big otherwise. I put a lot of effort on code quality and architecture, and I don't think this counts as slop, but I do think it violates Codeberg's new rule, so I guess I'll have to look for another place.
No idea where yet; I don't want to go to Github, and I believe there were similar concerns about Gitlab, so I don't know where to go yet.