There is no doubt that raw ingredients maintain more vitamins. Is it a big deal to me? not really. The soup in vitamix never boils or simmers, or anything really close. So it is virtually raw.
however, that means the uses are limited. If you want a rich-tasting soup, that's usually going to mean caramelizing your onions and garlic a little, slow-simmering the carrots to bring out their sweetness. I have the Vitamix 5200 and love it but the soup-making feature is so far not one that I care for. My brother-in-law supposedly invents all kinds of great, nearly instant soups in it; when he's a little less busy (he and my sister are moving), I hope to get some advice from him.
So far, the soups I've made, even following the recipe exactly, are not great soups. The onion and garlic give it a very sharp taste with no actual cooking, the whole soup tastes sharp and off instead of rich and warming. I wish I had gotten the cheaper version that does the same stuff but without the automatic timers. Not a big deal.
The main thing ot love about the Vitamix i that it is a powerful and sturdy machine. I'm tired of $50 blenders that conk out after a half a year. Now, truly, I like a thick smoothie. Really thick. But on my last blender, it was the "on" button that broke. How weird is that?
The Vitamix is guaranteed for seven years. no questions. I bring it back to Costco, they replace it if it breaks. Meanwhile, what I can make in my Vitamix that I can't do in the other blenders is an awesome no-sugar-added sorbet, and I do that several times a week. I also made pistachio butter, which is probably too good to be legal.