Having tried both I really prefer mori, mori imports some core clojure functions with it. I found working with iterators which was recommended with immutable.js very awkward.
Good article, I really agree on an issue being like a log that you can see the thoughts develop over time. Invaluable for getting people up to speed that are new to an issue.
Got some good success with GLM-4.5-Air running locally recently. Still mainly using claude code max though.