Provides alternate recipes for vanilla items in addition to the normal ones, usually with various trade offs for resources/time/difficulty.
Mods introducing new content into the game.
New ways to deal with enemies, be it attack or defense.
Furnaces, assembling machines, production chains.
https://mods.factorio.com/mod/SimpleSilicon
I've also told him about this.
Only 9 months late but I finally got around to this - silicon wafers are added to the alt recipes.