I wonder if, in that world, Lisp would be the boring corporate language, and HN would dream of a world where object orientation (which is clearly superior) never had a chance to leap from academia to the mainstream, and hackers post their niche flavors of Java and Smalltalk here.
Well, that world would also have CLOS - maybe the AMOP would be treated with the same reverence as the GoF design patterns book... ;-)
this article discussing how closure creation is disguised OO (and vice versa) might interest you.
https://wiki.c2.com/?ClosuresAndObjectsAreEquivalent
Even discussed here a couple times:
https://news.ycombinator.com/item?id=33676959 - November 2022, 64 comments
https://news.ycombinator.com/item?id=9363635 - April 2015, 45 comments