The umami was the only differentiating factor and even there it was like a small difference. I eat meat, tried the burger because if can cut out a little meat why not? The impossible burger was exceptional enough a replacement that if its on the menu, I'll order it.
When I was in the Boy Scouts, we had this saying for when we were out camping and hiking. It was "you're only as fast as your slowest hiker". I realize that the context here isn't the same but the concept is still very much applicable. We as a species can only be judged and advance as fast as our as the 'slowest' of us are willing to move.