To put things into context, departing Rimini, IT last year; we were given three clearances to Milan-Malpensa. On a 4 minute taxi-out. Airborne, in the SID directed turn, the radar controller asks if we are proceeding to FER. We weren't cleared or flight planned to FER, but go there we did. SA is about dealing with changes, imposed by ATC, weather or the plane, not just following a script.
GF