Hot planet to develop AI, 26 technologies, 2 new minerals, 5 buildings, many items, custom terrain, music, unique challenges...
Mods introducing new content into the game.
New places to build more factories.
Augmented or new ways of transporting materials - belts, inserters, pipes!
Trains are great, but what if they could do even more?
Map generation and terrain modification.
New Ores and resources as well as machines.
Things related to oil and other fluids.
Furnaces, assembling machines, production chains.
Changes to power production and distribution.
When you use an upgrade planner to upgrade from normal to neodymium rails, the upgrade works for everything except elevated rails directly connected to rail supports