If they still existed they would probably have moved into existing human-mined tunnels. Whether they'd wait until we abandoned them or chase us out, or help us build them, would depend on our relationship with them
"A train derailed in the tunnel due to a giant sloth sleeping on the tracks. No word of survivors at the time of recording, but officials say that they are expecting multiple fatalities including the sloth."
If they are willing to bring back giant burrowing sloths, I am willing to experience the "tunnel hovels to escape climate change" timeline so long as I get to be a sloth supervisor.
Lol I know this is a joke but they died out, tree sloths existed back then too and are a totally separate group of animals. They didn’t evolve from the animals that dug this tunnel. They do share a common ancestor millions of years ago but this is like saying saber tooth cats evolved into house cats.
Can you imagine being stuck in the dawn of human agriculture, and you seek shelter in a nice cave that you found.... And then a Giant Sloth just lumbers in after a bit.
I mean, I imagine any Homo species of the time would know not to go inside one of these, but still.
I hear what you're saying, and I recognize anyone inside would be safe from being eaten.... However, as with an elephant, I wouldn't want to be woken up in the middle of the night having intruded upon their home.