But it’s also not necessarily useful. The only reasons to go to another star are - exploration and curiosity - scarcity at home - building species level resi

But it’s also not necessarily useful. The only reasons to go to another star are - exploration and curiosity - scarcity at home - building species level resilience - interactions with some other species - escape from local political or other turmoil All of these are human except for scarcity. The others don’t require sending more than a small vessel. But if you can build stellar scale structures, maybe the value of interstellar travel once the novelty wears off is pretty minimal. And perhaps while your local star neighborhood is only 5 LY away, the next advanced civilization may be thousands away. Without superluminal communications and travel, or at least very close to the speed of light travel, maybe there’s really no such thing as populating the entire galaxy in the time a species is advanced enough to even consider it. Maybe 500 years to travel isn’t extreme (although for humans it feels like an impossibly long time over which to reliably keep social cohesion and purpose), but 10,000 of 100,000 is just absurd.