Okay, some thoughts from someone who's been on Victorys since 2000 (2nd year production bike.) I still ride my 08 Vision, and also had a 07 Jackpot as a second (toy) bike. The Jackpot was sold to buy the Spyder because the wife felt more comfy on 3 wheels. If I'm riding solo, I'm on the vision. 2 up, it's the Spyder.
Polaris has just stabbed an awful lot of people in the back, and it's primarily the guys like me who have been supporting them and preaching the faith for a long time. I don't have any desire to go back to HD, but prefer American built machines. Yes, we've seen it coming, but it still sucks. As soon as Polaris bought the Indian name, they stopped all improvements on the Victory line. All the interest, support, and cash went into Indian.
The Indian is a pricey, "me too" version of a HD. I've ridden them, they're nice bikes. But my Vision is more comfortable, especially for a big guy like me. And frankly, I wouldn't buy one now because I see that as soon as profits drop, they'll be history too, just like their watercraft line. Polaris has lost me as a customer for life with this move.
Someone asked "who keeps their bikes 10 years?" Well, among others, I do. Maybe longer. The only reason I traded the 2000 V92C for the 08 Vision was that the wife was much happier on the back of the Vision. The Vision is now 8, been cross country multiple times, and I have absolutely no interest in trading it for anything else. It's too comfortable to do that.
Commonality of parts between Victory and Indian? None. Maybe a few nuts and bolts.
As for supporting the bikes for 10 years, I call BS on that one right here. Victory parts have historically been hard to get anyway. They'll stock what they estimate the demand will be for certain parts, and when they're gone, they're gone. I don't believe for a second that 8 years from now I'll be able to buy parts for my bike except generic stuff. The good news is that every Victory I've owned hasn't needed anything but gas, oil, tires and brakes. Solid machines. And, I ride a whole lot.
Summation: I feel like I've been abandoned by someone I've devoted 17 years of my riding life to. I just hope and pray that BRP doesn't pull the same crap and abandon us if sales and profits drop.