Back in the "olden days" (ha, ha!), we had an ice storm in eastern WA that delayed us a great deal because they had to hand-throw all the switches. I remember it being announced that a customer service person would board the EB at MSP to help us with our connections. Hmmnn, that was a long time ago (don't remember the year, but probably mid-'90s?) because it was the trip where we had planned an overnight in CHI and didn't need the help, but we spoke to the CS agent to confirm that, as she met with people in the diner or lounge and then went through the whole train.
Don't remember any other specific instance, but I think there might have been one other (also on the EB).