I guess my point was, if you're not USING a longer hang distance, it's a disadvantage. And yes, I'm talking about low-stretch suspension and ridgeline.
Even with a low-stretch properly rated suspension, you get more stretch with a longer hang. This can be solved, as you mention, by hanging higher - but then you have tarp problems. I always look to minimize the height difference (at the ridgeline) between the unloaded and loaded hammock. This way, I can keep my tarp as close to my hammock as possible for winter use or bad weather. The longer the hang distance, the bigger the height difference is going to be, no matter what suspension you're using. Granted, for a super-strong super-low-stretch setup, it wouldn't change enough to be noticeable. But with the affordable, hiking-weighted materials I use, I can DEFINITELY tell a difference (and disadvantage) with even a 1' increase in hang distance.
"Physics is the only true science. All else is stamp collecting." - J. J. Thompson