Comment by cue_the_strings

This has certainly happened to someone if not the OP.

I did wait in a single spot for almost 10h, my 5-6h journey became a 15h one, in Serbia in the late 2000s. IIRC, a large part of the railway was down that day, couple hundred km, electricity issue or something. Some people walked off the train, which was in between cities but near the road. I was a student, didn't have an alternative, so I didn't. They didn't organize a replacement bus.

This kind of thing was (maybe not to that extent) common, like once every year or two. They rarely reported on it in media if the cause wasn't notable.