We have quite a few machines running ITS, LISPM, and other OSs on the chaosnet today. See <a href="https://chaosnet.net" rel="nofollow">https://chaosnet.net</a> for details.
Related:<p><i>A Short History of Chaosnet</i> - <a href="https://news.ycombinator.com/item?id=29927718" rel="nofollow">https://news.ycombinator.com/item?id=29927718</a> - Jan 2022 (1 comment)<p><i>A Short History of Chaosnet (2018)</i> - <a href="https://news.ycombinator.com/item?id=19480577" rel="nofollow">https://news.ycombinator.com/item?id=19480577</a> - March 2019 (6 comments)
It says "Usage of Chaosnet presumably waned as Lisp machines became less and less popular." That's basically true, but there was substantial Chaosnet usage from multi-user machines (e.g., UNIX, VMS, TOPS-20). Once you had a Sun-3 or MicroVAX, though, you probably left Chaosnet behind.