This is, of course, another issue. My entire rig (even when I'm also hauling the PA) fits into my little Chevy HHR.
I can certainly understand the visceral appeal of a Marshall stack, an SVT with an 8x10, and a drum kit like Neil Peart's. But if the physical size of my band's equipment was preventing us from being able to gig (stages too small to hold our stuff, inadequate transportation, whatever), I'd seriously start rethinking the vibe of the gargantuan gear over against the ability to go out and play in public and maybe even make some money.
Have I been in situations where the PA was inadequate to give me the amount of thump and roar that I desired? Sure. But if I had set up a monster rig to overcome the problems of an inadequate PA, then the vocals would have been lost, buried in my bass playing.
It all comes back to what's suitable for the genre, the venue, and the other technology components. In the genre I play I am a part of the rhythm section, not the star soloist... so I only have to be as loud as the drummer. Since he plays a ZenDrum, he can be whisper-quiet if circumstances require. So given the reality of my genre and the size of the venues we typically play, I can get the job done beautifully with something I can carry in one hand. If I rolled in an 8x10, no one could hear anyone else in the band, no one in the place could hear a conversation, and we'd be fired on the spot. So that would hardly service our music, our audience or our career.
If your genre and typical venues call for a mountain of cabinets two stories high, well, then that's what you have to haul in and set up.
This has nothing to do with being on a "side." It has nothing to do with one approach being "better" than another. It has everything to do with making choices that are
appropriate for the job you are trying to do.
I never understand why discussions like these have to dissolve into taking sides and trading belligerent posts. Geez, if you're happy playing your bass through a transistor radio, God bless you. If you need 2000 tube watts and a dozen 15's, God bless you too. Why does someone always have to "win?"