Originally Posted by
Tafflyer
The upside is that often time changes are shown as cancellations and rebooking which allows very flexible possibilities of rescheduling or even cancellation of whole itineraries if you wish to do so.
Indeed, this is a significant upside. Although I have learned through experience that it does not apply so generously to any AS schedule changes/cancellations. Re-routing following an AS cancellation/timetable change is not usually possible unless it is now impossible to complete the original routing.