I Just delay casteling, untill I have a move spare or it is forced to do so
@jposthuma thank you for your very complete advice :)
In all the 12 games of the World's Championship Match Carlsen-Karjakin both players castled King's side o-o: White between move 4 and 10 and black between move 5 and 15.
@tpr #14
"...12 games..."
Isn't this set by far too small to make any serious conclusion? And most notably for mere mortals.