I've been following this discussion with interest... I've noted the tinge of pride in the use of 'available light' photographer in the past... and the counterbalancing 'strobist' equipment mysteries.
Why would 'available light' carry a tinge of superior attitude? For one, this term has been used by the photo industry for decades and decades to sell equipment and film. The supermodels of the lens world are the ultra fasts, followed by the cheescake ultra longs and ultra wides...
Now this goes back to when film speeds were slow and flash was bulbs or the early electronics... when good lighting, even flash, was a professional or studio-like proposition. Even in the '70s, photo instruction covered 'available light' and 'studio' but as far as I recall nothing about getting the flash off the camera... The most the magazines talked was about bounce flash (you could sell the suckers another piece, because it has bounce...)
So if strobism has become entirely practical and easier to do, why is it still a fringe thing? For one, who makes the money in this? Can the manufacturers really sell you another p-TTL bell and whistle when you're looking at soft boxes and umbrellas? Hell, that p-TTL wonder doesn't even easily cater to holding one in your hand, tethered to the hot shoe... Which it ought to, right out of the box.
There's nothing wrong with the straight-ahead crowd (though we make fun of them as Canon and Nikon wonks
): stick the latest zoom on the latest camera and point it and shoot. Throw a flash on top, repeat. Buy the more later zoom and repeat. But that approach seems to leave skills unexplored... (Nikon caters most to the flash users by the way. Almost enough to have made me consider the brand.)
We're more sophisticated and self driven than that. So it's time to include illumination technology in this sophistication. And that's not to say: always do this or don't do this! That's like saying: always use the xx lens in this situation and the yy in that. That we recognize as silly thinking --- sure one lens may make the shot more convenient or easy to get, but if you don't have that one lens, surely you can still get the shot?