I think you're getting a little carried away. I don't see a lot of 500 and 700 owners selling fast. That's like saying everyone with a Ford ranger was gonna sell the day the Ford Raptor came out. Its 2 different worlds. Hell from the looks of it the P500 will haul more s*** on the back than that talon will.
I agree most P500 or P700 owners bought that machine for a reason when the P1K was available, for many it's the cost, big difference from owning a P500 for $160 mo. pmt. and a P700 for $225 mo. pmt. versus $300 to $400 per month it just wasn't in their family budget. Also especially for P500 they serve a niche market and offer a lot of smiles per dollar, especially if you can put it in bed of pickup and still tow a camper etc. I see a lot of them that way particularly with hunters.
I'm keeping my P500 I mow with it and get it really tight spots with it around property. My P1K LE isn't going anywhere, perfect for taking wife, dog, and grandkids out for a comfortable spin. Will sell my 2016 P1K5D, and use that cash to buy a Talon 1000R, even then my only plans are full UHMW armor underneath, a Winch, and probably a windshield since it rains so often here. Beyond that I fully expect the Talon to exceed my needs as a sporty trail cruiser that is a capable rock climber with the extra wheelbase.