Nitrogen infused oil? Nitrogen infused beer is called Guinness.

Pre-2017 CVOs are depreciating faster. HD reacted by offering incentives on the 2016s - not usual biz for Harley, an easy indicator of market value decline. Each major model change - as long as it is perceived as an improvement - accelerates depreciation of previous models. Other bike brands, cars, trucks, boats, RVs, etc. - same deal.
I may wait until the factory warranty expires on my 2017 to do some engine mods - or may not. Out of the box the bike runs better stock than any HD I have owned. Not burning the chit out of my right leg (stock) was a major plus also.
Anyway, heard the same string of thought re: older models are worth more back when it was carburetor vs fuel injected. Don't hear that one anymore. Some are happier on older bikes no doubt & some of the newfangled bike doodads can be annoying. What makes a ride your ride is what is important. Not the age or newness of the bike. You ride what you ride because you like it - really all that matters. That being said - unfortunately has little to do with the value of that bike to others - the market determines that.