Robert, you would love it here in Nashville. We typically* only lose our AC and Christian AC stations to this nonsense, and even then, only around Thanksgiving. The FISH (the Christian AC) will probably do a "teaser" of Christmas music this Saturday, if previous years are any indication. So no real loss here, since usually only those two blow out their usual formats.
*I say "typically" here because last year, our classic hits station (93.3) also joined in on this nonsense. They are dial-positioned BETWEEN 92.9 and the FISH, but the days of analog dials are long gone, so I am wondering how few people they tricked by trying that. 93.3 did NOT go all-Christmas in 2016, their first year in existence, at least as a classic hits station, so rumors of an impending format change abounded, but those rumors proved unfounded. 93.3 is only a translator here, so their signal, and thus their impact on other "all-Christmas" stations here, would be limited.