I've been on vacation for the last week so I'm just now hearing about these. Apparently an
Amtrak (MARC) train in Maryland with about 900

people on it stalled for 2 hours on JUN21. It had no power and no air.
On JUL05 another
Amtrak train stalled with over 600

people on it for over an hour without air, but delayed even longer before it was moving again.
These passengers weren't really stranded in the same sense, but it shows that delays, some of them lengthy, are certainly not limited to airlines.
For all those who tout the rails as the best things ever and the airlines as the worst, time to air your dirty laundry.