most of the big hikes have been where petrol/diesel models have been replaced by hybrids.
toyota hcr for example, i am on wpms and when the hcr came out only 2 or 3 models required an ap.
but when it changed to hybrid almost all required an ap and quite high ones.
also it depends on how new the model is and when facelifts etc are due, ap’s will go down prior to a model being revamped and when the facelift arrives they will go up. basic supply and demand, cash buyers tend to hang on if a facelift is due they want the latest version.