Why were those train modifications made?

Just hit 69 coaster after a trip to Waldameer yesterday. Ravine Flyer II was absolutely incredible. Instantly went to my top 10.

Rollo Coaster at Idlewild. It seemed giant at the time (I think I was 5). My aunt told me it was just a fast train.

This is why I don't even bother with them, haha.

3ds look nice. I like the colors. Maybe some preview pics for trackwork?

Sounds like it'll be fun, but not overly thrilling. It's nice to see Kennywood making a big move, though. Also, I'm glad they're doing something with the Turnpike (spot of the new coaster) rather than just getting rid of it forever.