[thevardanian]

Resilience. Being multi-planetary means your species is fundamentally protected from almost all catastrophic events. Having presence among multiple stars systems would mean not even planetary level destruction would be a threat to a species. As it currently stands humans are still very much in a precarious situation as an errant asteroid, even a decade away, could mean game over for all of humanity.

[dogma1138]

You missed my point, if you can attain that level of technology you don’t really care about your planet at that point either.

The amount of energy required for to cross the intergalactic void is insane.

Our local group is about 3 megaparsecs in diameter the Milky Way is around 32 kiloparsecs in diameter.

Asteroids aren’t a problem if you can expand to other solar systems yet alone across galaxies.