Well said. I imagine that maintaining a project as ubiquitous as serde is not an easy job, and I'm sure dtolnay is no stranger to holding his ground when people disagree with him. I'm therefore not that surprised to see him holding his ground on this issue, and I think people should still continue the discussion with him instead of immediately forking.

I personally think that proposing a PR to allow opting out of this (as is being hashed out here: https://github.com/serde-rs/serde/pull/2580) is a much better solution than forking. In my experience in open source dev, writing a PR often produces much better results than just complaining in an issue.