Well. Maybe not so much a "crucial feature" as it is a super basic feature, that shouldn't require 6 revisions of the software to finally have... Anyway, a lot of times I like to listen to the videos I edit afterward to make sure everything is coherent if you were just listening in the background. And I don't want to have to waste the time of exporting to do so, especially when I have a cheap graphics card that can't do it very quickly.
