@silverwizard I am very close to the "end" (in gameplay objective terms; the factory must always grow) of my initial railworld and since I own both the switch and PC versions of the game I'm SORELY tempted to do the PC version quite heavily modded.
K2 doesn't seem to be quite the vibe I'm chasing but I got pretty far in the main game on "solar alone" once I could produce them in automated fashion, so maybe I just need to do something similar with wahtever it is I pick.