I broadly agree on the timeline, but "as soon as it had a non-lava surface" is still plus/minus a couple hundred Mya. I do believe temperate conditions were a r

I broadly agree on the timeline, but "as soon as it had a non-lava surface" is still plus/minus a couple hundred Mya. I do believe temperate conditions were a requirement. I doubt the first cell membranes, for instance, were terribly robust.