yeah, who would drag a concrete cabinet around? Doom metal bands? as far as guitarists and egos, thats breaking no new ground. I am speaking as a reformed midrange hog. I once had a guitarist say to me, "its like you are saying everything and I cant get a word in edgewise". After my own ego cooled down over the years I realized that I am not the worlds greatest bassist (maybe one or two guys better...) myabe I should focus on the low end and leave the rest of the real estate to the guitards.
I wish that little cabs with modern tech could replace the horn loaded and multi driver insanity of the 70's but to me its like car gas mileage. It hasnt really changed that much in 30 years even with all the new tech.
For what it's worth, I use D'Addario Chrome flatwounds with a pick. I don't use distortion, I boost a lot of upper bass and lo-mid and I fit in my own sonic space that my guitarist can't touch. Of course, I"m just playing the classic rock of the 70's, 80's, etc. not downtuned doom metal.
Yet if I really wanted to sit down below the guitarist completely, I'd have to build a dedicated subwoofer that is capable of producing a true fundamental, because there is very little out there that does, no matter how much you turn up your "bass" knob.
And a whole lot has changed with speaker design since the 70's. Perhaps you weren't paying attention in class.

And I never said anyone shouldn't have a lot of drivers or play insanely loud (I find it kind of fun myself). I only said that we don't have to rely on old, outdated and HEAVY designs to get there.
I could load up a truckload of 3015LF loaded cabs and compare it to the volume and deep lows of any "vintage" rig you guys could manage to dig up off craigslist, and I'll haul these "
little cabs with modern tech" all by myself and blow your old 100+ lb., 3/4" boxes to bits.
But hey, if you like hauling it, enjoy! Makes no difference to me. I'm just a curious person wanting to know; Why all the devotion to heavy cabs? I still haven't heard an answer that satisfies me. I've only heard that only the old heavy stuff works but I haven't heard why that's so. I'm not talking about comparing these mammoth rigs to a little combo. I'm talking straight up comparison of modern, lightweight designs that deliver the same volume and sound as the old stuff, but at perhaps as much as 1/4 the weight, and at least half as much.
I'm thinking some people who prefer the old heavy cabs may not even realize just how good we bass players have it with "modern" technology these days. Now that I could understand.
It's not like I don't know what this old stuff is like. I've been playing for over 30 years. I still have a Peavey 1820 (now that is a mud machine...loud but terrible) and a Peavey 115BXBW. Both weigh over 100 lbs. and yet my little 38 lb. 215 cab has more clarity, more punch and is louder than either of those old pieces of junk. Granted the 1820 goes deeper, but so does an echo in the Grand Canyon...and they both sound equally appealing. If I wanted a cab to go deeper, I could certainly build one that outdoes the 1820 at a fraction of the weight.