Adds pipes on pillars that can go over anything and make those tight corners.
Mods introducing new content into the game.
Augmented or new ways of transporting materials - belts, inserters, pipes!
Things related to oil and other fluids.
If you place two machines with different inputs, unless you shift them by 1 tile, elevated pipes connect together and one overwrite other. https://imgur.com/a/8VPKhpr
well yes, they're basically underground pipes, what did you expect?