Kay said that they changed it to fit the goals of professionals, not children, and it’s something that he’s expressed regret about.
A point that Alan Kay has made re.
Mark Miller
1

Thanks, I didn’t know that. Doesn’t really matter, though, because as chief marketer for Smalltalk, it’s my job to tell the best narrative that sells the product. I can bend the truth a bit — isn’t that what all marketers do? ;-)