Another factor is that if you move countries some of your "purchased" movies disappear because you only "purchased" the right to watch them in territory X. Whi

Another factor is that if you move countries some of your "purchased" movies disappear because you only "purchased" the right to watch them in territory X. While DVDs also made a half-hearted attempt at artificially preserving market separation with "zones" (I guess to continue the natural market separation that came from NTSC vs PAL and friends in the VHS days?) that could be worked around easily enough.