There is of course the point that there is NO PLACE in the solar system (beyond Earth) at the moment where a million people could go... so "emigration" is not only a problem of transportation, but also of life-support at the end of the journey.
I would expect that most Daneverse countries would look more for "already habitable" planets than to build huge orbitals to put people into. Still, with a habitable planet in another star system one country might think "lets grab it"... and sent at least ten thousands people there. Still, getting that many people on a different star is a huge effort, even for a rich nation state.
I would expect that most Daneverse countries would look more for "already habitable" planets than to build huge orbitals to put people into. Still, with a habitable planet in another star system one country might think "lets grab it"... and sent at least ten thousands people there. Still, getting that many people on a different star is a huge effort, even for a rich nation state.