Although I only worked visibly on tracks, more of my dealings were with testing and other usual shenanigans when dealing with a group of people working on a project. I didn't work on any scenarios. I had one in the works, but my plans for it fell through. It was going to be a Futureland with no grass, trees, etc using only the four colored grids for land, basic blocks, and the glass scenery objects.
The installer was a pretty big bone of contention.
Fun fact: The vast majority of the team that worked on it was on dial-up.
Thankfully, the file sizes are itty bitty, so it was never a limiting factor in any way.