Should start rightaway exactly because it's so faraway. I'm also comparing to all the materials research that are being suggested here, for which specifically microgravity enabled breakthroughs seem ... quite impossible? Including efficiency breakthroughs of the economic variety, btw.

(Yes I agree rotating spaceships are cool/feasible, but what if you are dead set on finding "benefits" of microgravity?)

And out there, you have free radiation for that accelerated evolution..