Adds compressed items, buildings and recipes that uses compressed items.
Mods introducing new content into the game.
Transportation of the player, be it vehicles or teleporters.
Augmented or new ways of transporting materials - belts, inserters, pipes!
More than just chests.
I guess it's due to the update of some existing recipes. Currently I have to use console to redo all 4 tier compression technology to re-unlock all those recipes.