@dang title has been changed to "The (successful) end of the kernel Rust experiment", since there were complaints in the articles comments from the committee members that that was a sensationalization of what actually happened.
From https://news.ycombinator.com/newsguidelines.html: "Please use the original title, unless it is misleading or linkbait". Therefore: when misleading please edit.
Unsuccessful experiments have no end unless motivation to keep trying runs out — but Rust seems to have no end to motivation behind it. Besides, if it were to ever reach the point of there being no remaining motivation, there would be no remaining motivation for those who have given up to announce that they have given up, so we'd never see the headline to begin with.
Imagine a world where the Rust experiment hand't been going well. There is absolutely nothing stopping someone from keeping at it to prove why Rust should be there. The experiment can always live as long as someone wants to keep working on it. Experiments fundamentally can only end when successful, or when everyone gives up (leaving nobody to make the announcement).
That said, consider me interested to read the announcements HN has about those abandoned experiments. Where should I look to find them?