Bon Voyage
I have learned the hard way what you have just said.
Last trip was flying to Tokyo and home from S Korea.
Was very happy with my flight and then American cancelled the one to Tokyo and put me on a very bad one. I needed to reschedule and guess what happened to me. I googled aa.com and got a fraudster site. I rebooked with a crook and the end result was I got bilked out of $759 but was able to recover $450.00.
I have also had flights changed by a very short period of time and that has not been a problem.
Once the time was the exact same but the day had changed, I had to add on a day to my trip which was not a problem. Cost me more but was glad for the extra day in London. For some people, that would have been a problem
I assume that there will be changes now. Always hoping it will not be too disruptive.
And like you, I hate getting the dreaded notification. I open it with a sinking stomach.