All of the above. Car Dealership Guy has discussed this over the last few months.
BTW, lately, he's focusing more on dealers. After all that's his name. One reason he's focusing on dealers is that they are starting to feel the squeeze and having problems. It is a pretty significant shift in his tone.
This is good news for consumers as we are finally starting to get some power back. Popular brands are still a problem for the end consumer, though.
I was in the market for a used vehicle last year at this time. I've still be monitoring prices even after my purchase. I've seen a very significant drop in used car prices in the last month or so. I think the CPI will continue to benefit from automobile prices. Should continue to be significantly downward, with new car prices flat or down too.