IIRC, ralfj was insinuating that Java was memory unsafe and arguing about it with experts on HN not too long ago. But I think he was coming off hot from the T-spec debacle so I understand it as him wanting to blow off steam.
The most toxic Rust leaders exited from the project a few years back, though some are flaming more freely than ever, e.g., Go barely deserves to exist, “SQlite is a terrible example” etc
I remember seeing a blog post about that years ago and I probably bookmarked it but Firefox doesn't seem to have a way to search bookmarks for "Java" but not "JavaScript" and it appears "memory" wasn't part of the page title.
(And it's entirely possible it was back when I ONLY saved a copy of articles of that tier of "I may need this again" via ScrapBook/WebScrapBook, I haven't yet set up the browser/indexer for those and a few quick ripgrep searches aren't turning it up.)
I believe it had something to do with the JVM having some flawed semantics which couldn't be fixed without breaking compatibility with existing bytecode.
The most toxic Rust leaders exited from the project a few years back, though some are flaming more freely than ever, e.g., Go barely deserves to exist, “SQlite is a terrible example” etc