Multiply the stack size and weight of items, configurable globally, per item type and per item name.
Small changes concerning balance, gameplay, or graphics.
Augmented or new ways of transporting materials - belts, inserters, pipes!
More than just chests.
The type is very broad. Please also allow sub-groups such as "science-pack", "raw-material", "intermediate-product", "belt", and so on.
Additional Info: - https://wiki.factorio.com/Data.raw#item-subgroup - https://lua-api.factorio.com/latest/prototypes/ItemSubGroup.html
