Going for the speed achievements. I had the great idea that fewer asteroids meant I could race to planets and Solar System Edge with lighter ships.
…turns out it also applies to asteroid chunks. My ships needed a full hour to refuel, and space science took several hours to get the research for getting to Vulcanus.
RESTART
There is a viable strategy with it, but it requires a specific infrastructure from the start: Build a huge science platform with 40 grabbers to get going, and ship water up via launches. After Vulcanus for carbon, all fuel can be shipped up.