Seems to me when the heavy drinkin' and pill poppin' disappeared from the scene country music lost a lot of its soul. Not that that has a direct correlation to the article's observation necessarily, but I think there's more to the character change in country music (regionally or not) than the proliferation of one particular style of the genre.
And I don't know if this has much to do with anything but I do know a good number of the county stars back in the day were just regular folks with regular jobs before they hit it.....right? Seems like the norm these days is grooming for the Nashville role rather than letting life experience influence the artist and Nashville embracing whatever comes from that.
There is still a lot of heavy drinking (Chesney's Hemingway's Whiskey) stated and implied, and certainly a lot of heartache, but there is a also a big trend to celebrating kids, parents, childhood memories and specially idealizing sweethearts.
When I read about the road many of the current country stars followed to get where they are I still see mostly regular folks that went trough a fair amount of struggle, many toiling for years in non-music related jobs while making their name and waiting to be spotted, and many more making the honky tonk and Mexican restaurants rounds for long periods to make ends meet, but the road is easier as they have a chance of being discovered and signed much earlier if they are talented (or composed that killer bro country tune)