How the Challenge resolved

My last post detailed how I had booked a backup option via United from SFO-PHX - I was very confident this would be a solid option to get me to Phoenix.  However, I was surprised when I received a text notification from United saying the flight had been cancelled due to the Max 9 issues.  The assigned plane wasn't a Max 9 though...maybe other network impacts caused the cancel?  In any event, the rebook was for the evening which wasn't going to work.  

After a check of options, I had no choice but to work through the cancels of these flights and rebook on a direct American option.  It wasn't my first choice but I was able to land later morning which gave me time back.  Lesson learned - always be prepared with other connect options!