Having spent some time in Miami, and having walked nearly all of Wynnwood in detail very recently, let me add a bit of nuance to the mix relating to the article specifically (which reads like a bad press release).
A lot of the murals and the impressive tags in Wynnwood aren't put there by Miami artists (anecdotally quite a few of the local kids I met disliked the scene down there immensely). They're done during Art Basel by out-of-town artists who come down for the event. There is also actually quite a bit of real poor quality graf on the outskirts and in abandoned buildings in the area.
To the extent that Miami supports Wynnwood, one has to realize that Wynnwood is a fairly large arts district (we're talking much larger than the SN), but is also virtually empty of residents. It's a warehouse district in the true sense of the word, so there's very little for rich condo-ites to complain about. They want to see high-quality street art, they go to Wynnwood for openings once a month, they want to live in their condos without a trace of graffiti nearby, they go back to the towers on the beach. I'd hardly call that symbiosis a full-throated embrace of graffiti in that city.
After spending multiple days talking to a number of street artists who gave up graffiti years earlier to focus on professional pursuits, you realize their own retrospective opinions on tagging are all over the map. And, their opinions on younger generations of taggers aren't nearly always as charitable as one might expect.
Right now street art is in vogue amongst the upper crust of the art world. Is that a permanent state, who knows? Tagging as an art form was in vogue back in the 70s IIRC, so to assume that the art world, which to an extent follows the opinions of the ultra-wealthy, is going to permanently embrace the street medium is heavily depending on a traditionally fickle self-selecting group of people. People should be wary of assuming big cities will continue their embrace of street art, especially since a spate of articles has started appearing out west focusing on the maintenance headache that throw-ups are costing of the city of Los Angeles.
Wherever someone comes down on the street art/graffiti medium, the reality is much more nuanced than Miami > Columbus, and the future will be too.