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.

Monoblocks sound better with mono records.

Why run seperate amps? Most Integrated amps can handle most speakers, especially those that are rated 88 db and above in sensitivity. If a Integrated amp can do the job, why spend money on a seperate amplifier? I mean, what are the benefits?

For the first time in my 7 year experience I've begun thinking about monoblocks. My problem is the expense and having the space for them, which I don't. The mere fact that I'm thinking about this means I'm in too deep.

You don't need a fork lift to move the amp(s) around.