The long and the short of what I'm trying to get across is quite simply that, in the absence of technology indistinguishable from magic -- magic tech that, furthermore, does things that from today's perspective appear to play fast and loose with the laws of physics -- interstellar travel for human beings is near-as-dammit a non-starter. And while I won't rule out the possibility of such seemingly-magical technology appearing at some time in the future, the conclusion I draw as a science fiction writer is that if interstellar colonization ever happens, it will not follow the pattern of historical colonization drives that are followed by mass emigration and trade between the colonies and the old home soil.