Whoever said the Sicilian is obsolete is wrong, to put it mildly! Maybe they were fans of a particular opening like the French or Pirc and they were emphasizing that they think their opening is better. Was there a particular variation of the Sicilian they were talking about?
The Sicilian is the most active response to 1 e5.
I used to play chess a lot in the 70's and my favorite is the Sicilian Defense. I stop
playing 20 some years ago and just started to plays recently. I played somebody and he told me that my defense is already absolete. Could somebody tell me what is the most modern opening and defense nowadays in chess?