Why monoblocks?

There are valid engineering reasons for designing monobloc amps and I imagine that sonic benefits thereby flow. But if mono designs are really that much better then why aren't all ultra high end electronics monobloc designs? Where are the monobloc phono preamps, D/A converters or preamps?

For all those people using long interconnects/short cables, how do you deal with placing delicate, vibration sensitive electronics so close to your full range vibration creating speakers? There's also the issue of power amp transformers and woofer magnets/crossover components interacting due to their close proximity. I don't know this for a fact, but maybe long interconnects/long cables is really the way to go? Just something to think about.

Undertow, since when did dual mono become monobloc? All I'm saying is if monobloc designs were the end of and be all, then why aren't there a substantial number of monobloc preamps and converters?

It may be that, at least historically, that monobloc amplifier designs came about not for any sonic reasons, but instead due to engineering/construction practicalities. In a high powered design, especially one using output tubes, a single chassis would have to be so large as to become impractical. It's probably cheaper to manufacturer two smaller cases than one humongous case of equal rigidity.

People seem to be presenting their opinions as facts. Not unusual, but somewhat suspect, IMO.