The problem is the LLMs completely change the equation. Before LLMs, beyond very junior (needs serious coaching) levels, reviewing was typically faster than writing the code that was reviewed. With LLMs, writing code is orders of magnitude faster than reviewing it. We already see open source projects getting buried in LLM slop and you have to find the real human or at least carefully curated contributions among the slop.

I would not be surprised if many open source projects will outright stop taking PRs. I have had the same feeling several times - if I'm communicating with an LLM through the GitHub PR interface, I'd rather just directly talk to an LLM myself.

But ending PRs is going to be painful for acquiring new contributors and training more junior people. Hopefully the tooling will evolve. E.g. I'd love have a system where someone has to open an issue with a plan first and by approving you could give them a 'ticket' to open a single PR for that issue. Though I would be surprised if GitHub and others would create features that are essentially there to rein in Copilot etc.