After 200 hours I have a "factory" on Vulcanus, Fulgora, and Gleba. I need to redesign all four factories, including Nauvis, at this point to use Foundries, and Electromagnetic Plants at scale, oh and Biological Science Labs. I have finally started learning circuit networks and train scheduling.
I had over 3000 hours in the game previously, got all the achievements that didn't require a time limit, and had beaten Pyanodon, SeaBlock, Bob's and Angel's overhaul, and several other overhaul mods that I don't remember, but I never managed to fully finish Space Exploration because of randomly generated items, and a complete inability to comprehend how the old circuit network worked.
Space Age is absolutely the best of all the overhaul mods combined into one single expansion pack. I cannot wait to get to the Shattered Planet and find out what no one has shown yet. I'll be weeks behind them when I get there, I'm sure