[magduf]

Well there is some sense to it: with the extreme weather we have to look forward to thanks to climate change, it'll make a lot of sense to burrow underground and live there. Underground colonies would be mostly immune to hurricanes, for instance, and probably a lot easier to keep warm when polar vortexes result in -50C temperatures outside in the winter, and easier to keep cool when it's 60C+ in the summer.

[smallgovt]

Maybe it'll be like the history of lobsters, where it starts as housing for the poor but eventually becomes housing for the rich.

[normal_man]

You got me there. Somehow I doubt Elon Musk would be moving into the rabbit hole next to mine, however.