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Mods introducing new content into the game.
Augmented or new ways of transporting materials - belts, inserters, pipes!
I suggest removing the technology dependency on Landfill (or make it conditional on it existing). That way you can combine Platforms with Impatient's Landfill Tech Removal. As it is the game crashes on startup if both mods are installed.
Good idea, I will do this when I port to .18