Ya that's why I have 8 openings in my repetoire
As white I play catalan, queens gambit and trompowsky
As black I play petroff, sicilian najdorf, sicilian Schveniggan, grunfeld, symetrical english
Magnus has a lot more than that in his though
Of course but all the other openings are for avoid others to prepare from his online games
He frequently plays catalan, queens gambit, ruy lopez, Italian as white when he has to win
If you have mastery in 8 to 10 openings it can help you till super gm level
And every titled player knows every opening but not very deeply they have mainly few favourite openings which they need to mastery
Im not so sure about that. If you follow Magnus career from the beginning he has always played a wide variety of openings. The other thing is refuting an opening is not how Magnus typically wins. He goes for a tiny advantage with white and slowly increases that advantage through the middle game and end game ....the sort of positions players normally just agree to a draw to.
Sicilian Defense is best!
Of course