"So "purist" has become a default catch-all for lazy hacks then?"

Lazy hacks are some of the worst offenders in bandying 'purist' about, particularly the writers of promo puffs desperate to convince us that their act is new and exciting, and constitutes a sorely-needed antidote to all that dreadful old-fashioned stuff that went before. I am just now reviewing a CD of Zydeco music in which the blurb talks about the artist "dragging [Zydeco] by the scruff of the neck into the 21st century". Another classic cliche, of course, but Zydeco?? A music that's embraced change so enthusiastically over many decades? The joke in this case is that "dragging it into the 21st century" apparently involves smearing it all over with 1970s Chris Spedding-style electric guitar licks.