what would really be funny if they ever did build such a thing.... half way into the trip a new ship would probably catch up with the original one that hadn’t even arrived yet :P
That’s the risk of such a long term project. That technology could overcome some of the speed barriers we face. And having waited may prove to be the answer, yet it’s a chicken and egg problem. If you don’t try, you don’t fail, and you don’t learn. So if we find a way to travel to a nearby star that has a habital planet, we must go even if the posibilty exists that future technology may make your first attempt seem juvinile and foolish. Won’t out great grand children look back at us and say “they had it all wrong”. I certainly hope so or we have failed as forefathers.