Damn shame this comment section turned into an EOS battleground. This game is worth a hell of a lot more than that.
Have I ever made it further than tier 4? No. Will I start new playthroughs countless more times in an effort to? Hell yes.
I always get to the part with nuclear power, then I take a look at the space elevator objective recipes, realise I need to multiply my factory size by about 20 and just nope out