I brought space age and I havent even gone to space yet. I havent even played with that part enabled, I've just been making a vanilla megabase with the new quality items and rails. They're insane it reminds me of bobs mods.
I’m no factorio expert and I prolly took 20 hours before I managed to get to another planet. Blows my mind people can beat the whole game in that time.
20 hours was probably the time I was finished with the basic train network and set up my first "big" steel smeltery (just a small one that was capable of smelting one train at a time, didnt want to build to much of them without bots). I'm currently at 30h and I can now finish all of the nauvis sciences, getting bots and setting up nuclear. This is also my second run I ever did(didnt finish the last one due to space age) so I am much slower. I also fucked up my starter base so badly, that it wasn't anywhere near being capable of getting me through any research higher than green without turning into a gigantic spaghetti.
Absolutely valid move here, we started a mp server, three total players and while we didn't do any kind of rush, we all agreed most of us will need a lot more hours to actually get to play with everything properly.
As AliasVortex@lemmy.world said, all parts of Factorio are mods, and can be enabled separately. The Base mod, which can't be disabled has the vanilla game; the Quality and Elevated Rail mods, which are from the Space Age DLC but can be activated whenever; and the Space Age mod.
I don't know which mod is responsible for changing science and recipes though. Coupd be either side.