I don't dispute the numbers in the study, but without added context, I think some of the comparisons lead to nonsensical conclusions because of the shifting landscape of new model availability with added manufacturers. Also I think a lot of the mfrs, shot their used pricing in the foot due to announcing future upcoming charging plug changes.

Similarly with "slow selling new EVs" there is an unrevealed item there on how much inventory some of those models are supplied with. e.g dealers might be keeping a high markup on models they know aren't going to be delivered in high volume - so they keep cars in the lot w/ high margin while pulling in curious car buyers with it.