Palabra Puddlegum

Would it be possible for LL to allow air and ocean vehicle traffic through vacant sims? I like to sail, and I think it would enhance my gameplay experience as well as my sense of immersion if I could travel between separate sims by physical means. As it is, I just come up against an invisible barrier whenever I try to sail into what looks like ocean, but is in fact a void. Couldn't LL repackage vast swaths of empty ocean as vast "sims" with extremely limited usage (low prim count appropriate for vehicles, hour or even half hour object return settings, etc.)?