These studies on used EVs seem to always ignore the impact of tax incentives on the resale price. When you factor in that depending on where you live, you could see anywhere from a $7500-$14000 reductions the second you drive off a lot, of course the resale will take a hit when the second owner can't make use of any of these.
My 2015 leaf cost me $18K post incentives. Today it is worth maybe $10K but I've saved at least $6K along the way compared to an ICE vehicle. That's pretty darn good.
My 2017 FFE w/leather will cost me a total of $15500 if I buy it at least end (payments + residual + tax). If it is worth $9K at that point I still break even with cost of ownership.
I do however think that the early EVs will remain cheaper in comparison to their newer brethren, but this is a factor of more limited range.