It's a big universe out there, and there are other ways to leave the solar system. Several new destinations with new machines, technologies, and unique processes
Methane is highly flammable, so it should burn and create heat! So it should be useable in the heating tower to produce lots and lots of heat rather than being a useless byproduct, a small bit of compatibility to add a fuel value to Methane would be beautiful (and would make my life a lot easier lol) and it makes sense!
