Yea, it could have been more rapid or slower. Perhaps if it cooled down faster at the very start? I'm not sure, but I'd wager that the conditions couldn't have

Yea, it could have been more rapid or slower. Perhaps if it cooled down faster at the very start? I'm not sure, but I'd wager that the conditions couldn't have been that different. And it took multicellular organisms a few billion years to show up on Earth. We don't know definitively, but it seems highly probable we won't ever find remnants of complex life there.