building gets quality up through time,only effect when machine is working
Small changes concerning balance, gameplay, or graphics.
Play it your way.
when some buildings upgrade they tend to stop working. Like substation don't give power until I reset them, or sell chest from "black market" mod stops selling
same happens with Factorissimo entities, you can add them to blacklist (mod settings), manually, its a little bit clunky, but works just fine
