I deleted my comment after reading yours. I missed the key three words: "such as this". You're right, I read what (s)he meant in reverse. (S)he didn't mean "why

I deleted my comment after reading yours. I missed the key three words: "such as this". You're right, I read what (s)he meant in reverse. (S)he didn't mean "why did people create SML when other stuff exists", (s)he meant "why does other stuff exist when SML exists". Thanks for the correction!