TOFC Trains

[Justinmiller171]

Today I was at a family gathering, and the house I was at was within viewing distance of the RR tracks, well I heard the sound of a train horn out in the distance and ran outside hoping I wasn't too late to see it, First I saw a few UP engines, Then some Container cars, and then to my surprise were about 10 flat-cars with trailers on them. This is the first time I have ever seen a TOFC train and I had thought they stopped using them in favor of Containers, since that is almost all I ever see.

My question is: Is seeing a TOFC train unusual or am I just unlucky and haven't seen any until just today?