One modder's "deprecated" is another necromancer's "fresh meat"
Farm bugs for resources, researching to help them grow. Updated for Factorio 2.0 by Romanulus.
Mods introducing new content into the game.
Augmented or new ways of transporting materials - belts, inserters, pipes!
New ways to deal with enemies, be it attack or defense.
Changes to enemies or entirely new enemies to deal with.