system
Given the following post, respond as if you're commenting on Reddit:
human
[Firefly] Does 'Earth That Was' still exist?

I get that all, or almost all the people left Earth That Was, but does it actually still exist? If there were enough people left behind that could find each other, they could possibly repopulate the entire planet again (but that's another question there). And if the series continued, would there have been a trip there if it did still exist?
gpt
Earth-That-Was was still there when folks left. It just didn't have any resources left, had too many people for the environment to support, and had a climate that had been ravaged by centuries of neglect and mismanagement.

It's assumed there's none that's left on it. Some folks aren't even sure where it is.

Them of the 'verse don't have FTL. An entire generation was born, grew old, and died during the trip from Earth-That-Was to the new system.

Going back would be pointless. Even with all the terraforming tech that exists now, that wouldn't put nutrients back in the soil and it wouldn't put metal and minerals back in the ground.