This is mostly secondhand – only turbo I've been on was a Sidewinder for a short ride – but I've talked to people who rode turbos and went back to NA because the turbo didn't do anything good for them. The NA sled gave them all the power they needed. I'm sure most riders would take the extra power at 10k'+ in chest deep powder, but how many actually ride in those conditions? Not the most capable rider here, but I'd bet when you see enough OE turbos to look at a good cross-section of buyers, you'd find most of them couldn't tell you where or how it's made them more capable. Not that they won't sell or some buyers won't benefit, but most are buying for bragging rights and short blasts in easy terrain.
I get around pretty well for my purposes on a fairly heavy 600, typically riding at 7-10k'. Sure, there are plenty of places I don't go, and if it's deep, the steep stuff is a no-go. But it also keeps me out of trouble, and half the fun of it is doing things people think you can't on an old tank. With more set up snow, I can climb plenty steep stuff too. What's more, a guy here (TRS) built a couple sleds with 550 fans and big tracks for his grandkids to ride, but even he has fun on them. We're talking 50-60HP: as he puts it, you have to stitch your way up, but you can go.
My point in all this is that most riders, including much better riders than myself, simply don't benefit from a turbo. I just don't get the "more power makes everything better" talk. The people riding turbos here are very different from the typical person buying a new Doo turbo (and would be the same if Polaris builds one): most of them have been riding 800s and bigger and gone to a turbo because they've found the limits of those sleds and want to go further. That's just not most riders, and even a lot of guys who can fully use it will tell you they'd spend money on improvements in chassis, suspension, tracks and such long before a turbo.