You beat me to it, good on ya!
The article says that around 30% of those looking to finance a replacement vehicle had negative equity in their current ride and that the average deficit was $7200.00 for that group of buyers. An anecdote involving a guy who had 40K+ in negative equity in his Ford truck was mentioned.
It would obviously make more sense for these people to simply continue with their current vehicles, to pay them off and then to enjoy at least a few years of payment free driving, but not everyone thinks that way. Whether the vehicle suits their use well or not, they simply have to tough it out and make better choices when they are able to do so without borrowing more money to pay off their current loan.
This is partly a matter of insane vehicle retail pricing during the pandemic years but mainly a matter of poor personal financial planning and decision making.