Reading the NWOBHM wiki the Bruce Dickinson quote hits the bullseye. They could have just called it anymetal. Just when you get the point where there really is a difference between hardcore and thrash metal, a wild Melvins appears and it seems you're to blame eh? Metal & electronic genres all confuse the hell out of me. NWOBHM was a fiction, really, an invention of Geoff Barton and Sounds (music paper). It was a cunning ruse to boost circulation. Having said that, it did represent a lot of bands that were utterly ignored by the mainstream media. Because of that it became real and people got behind it
I was watching a documentary about ... some band? ... and there was an actual clip of an interview with Geoff Barton who said exactly that, I wanted to write about these bands, and needed to give them a genre or classification so I could talk about them as a group... so I invented the term NWOBHM...