Consistent with what you said Puro, because Mac is pretty ubiquitous and its pricing- with the exception of perhaps the very top pieces- is far more within the range of the audiophile of more average means, it is within the realm of possibility for a greater number of buyers and that helps make a market for it. There is a better market for a BMW that comes off lease after 3 years than the much more expensive newish Bentley or Rolls, which depreciates like a rock. (Quality here is not the argument, its very ubiquity helps assure a market. You could look at Toyata resale values, say, compared to almost anything else in the car market- i haven't done the research but would suspect it's an impressive figure. And, to be sure, reliability and a company that's withstood the test of time certainly helps). I'm not crapping on Mc here- i have a few pieces in my home theatre system and I gather that their audio only stuff within the past 10 years is well regarded. (Back in the day when I first started, it was 'old guy' stuff, except for the really early collectors' pieces and a couple of tube amps, a tuner and a preamp or two, all tube stuff).
For what it's worth, the term 'cult' could be applied to virtually any brand with a following. It's all a question of degree. Look at the folks on the Gon who worship a budget tube amp, or a relatively cheap passive preamp. Those have 'cult' followings too, don't they?
I don't think alot of the uber-priced gear that we are seeing in the last few years will necessarily withstand the passage of time. Yeah, maybe a few pieces-I hesitate to predict what those will be. Maybe that's a good topic for another thread. Which of today's big dog gear (100k+ tables, amps that weigh more than houses and speakers the sizes of Rhode Island) will fetch collector prices in 10 or 30 years? (think: Marantz 10b or Mclaren F1) And think of the brands, Halcro comes to mind (although I know very little about the product), that were vaunted as high priced state of the art just a few years ago, and have no real following that I am aware of today.
postscript: in saying all this, i realize I am not equating good resale value with sound quality.
Maybe out of an excess of caution, i should use my 'silly' version of that disclaimer i cooked up the other day.