@Bones McHorror — Power Pop is difficult to define because it is less genre than sensibility/mode. It’s imagining a world where all great songs are just interpolations of how “The Kids Are Alright” and “You Really Got Me” make you feel when you half-remember them whilst feeling some combo of wistful and anxious. Additionally, Power Pop is almost always best when it is unpopular or semipopular or otherwise tragic.
I think Power Pop practitioner Mo Troper sees it as akin to Camp, which seems kinda correct.
https://www.talkhouse.com/power-pop-is-camp/
I suspect it’s deeply rooted in nostalgia for a mythical teenage Eden where boys could be boys, women were either Bettys or Veronicas, gas and thrills were cheap, and everyone was very white and upwardly mobile. And how ambivalent the loss of this fantasy makes you feel is what determines how angsty yr Power Pop is.
I’d wager that Tom Petty was the closest thing to a mainstream American Power Pop superstar as so much of his work maintains the sounds and content of Power Pop and exists primarily to point back to original 60s legends whilst maintaining an “old ways are the best” ethos. But he’s not a particularly campy figure—unlike Bruce Springsteen who’s flirted with Power Pop sonics (especially circa The River) and was as campy as Morrissey back when the Boss was all about Brando films and imaginary hoodlums and the misunderstood mechanics of street racing. But the Boss has been seen by critics/the audience as supremely authentic, thus breaking the spell and keeping him from being a doomed Alex Chilton-esque kind of figure.