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.

80? I thought that my 46 hours were insane, but 80 is insane.

And also important is, that space exploration is insanely big. You can prepare to spend about 300h with it(of course depending on how much experience you have).