It's a big universe out there, and there are other ways to leave the solar system. Several new destinations with new machines, technologies, and unique processes
Mods introducing new content into the game.
New places to build more factories.
Changes to enemies or entirely new enemies to deal with.
New Ores and resources as well as machines.
Things related to oil and other fluids.
Furnaces, assembling machines, production chains.
The ammo productivity does not seem to apply to basic ammo, only piercing, uranium, and thorium ammo.