I think people are coming across one of the other two Alan Kay on Quora submissions[0], [1], finding this other answer, and aren't checking for dupes when submitting. This isn't that uncommon of an occurrence, plus the title of the submission for this answer is "Alan Kay on Lisp": it's not immediately obvious that the submission points to this Quora post.

[0]: Alan Kay Answers “Is There a Successor to Smalltalk?” https://news.ycombinator.com/item?id=15518746

[1]: Alan Kay answers “What was it like to be at Xerox PARC when Steve Jobs visited?” https://news.ycombinator.com/item?id=15575287