It gets stickier when we begin announcing that our own personal preference is the 'right way to do it' . . . the 'Folk Purist' who goes around ticking people off for performing in an inauthentic manner is a far rarer species than some 'modernisers' here would have us believe.

Yes, that all has the ring of truth. So for "purist" you could perhaps substitute something more precise, like "egotist bigot". Referring back to my original query, though, I can't see many journalists adopting "the egotist bigots will probably hate it" as a cliche. So "purist" has become a default catch-all for lazy hacks then?