I stayed on Nauvis resources for a long time. I was in the exact same thinking as you, thinking I am in critical desperation for copper. But when I went far enough on Nauvis, I found patches worth millions. I don't know if that was just my luck with generation, or if there's some inner range that SE just reduces resources, but basically for normal resources Nauvis is fine for a very long time. I'm running a bit low on uranium and I need to push into biter territory a lot, but nothing unsolvable. Also I've been using a lot of uranium ammo so that's probably why.
My first planets were when I needed vulcanite (I switched my entire smelting to vulcanite block infused for the +50% ore efficiency), and later the special resources for space sciences.
The rocket reusability tech, together with the aeroframe scaffolds used in Low Density Structures alternate recipe, and on top of it all the best productivity modules you can afford, are to me the most important things - tryin...
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