A group of planets still orbiting their dead star.
Mods introducing new content into the game.
New places to build more factories.
Transportation of the player, be it vehicles or teleporters.
Augmented or new ways of transporting materials - belts, inserters, pipes!
New ways to deal with enemies, be it attack or defense.
Armors or armor equipment.
Changes to enemies or entirely new enemies to deal with.
Map generation and terrain modification.
New Ores and resources as well as machines.
Things related to oil and other fluids.
Related to roboports and logistic robots.
Furnaces, assembling machines, production chains.
Changes to power production and distribution.
Insulation science pack needs Prosephina Convector to craft The technology of Prosephina Convector needs Insulation science pack
Another deadlock: Rubber needs Prosephina Convector to craft Prosephina Convector needs Rubber to craft
That is a weird, but understandable regression. I was updating some things to new factorio apis, and this one got in. Should be fixed when I finished uploading.