Any size company has economies and diseconomies of scale. Very large companies tend to be very robust -- they can withstand a very wide range of conditions and

Any size company has economies and diseconomies of scale. Very large companies tend to be very robust -- they can withstand a very wide range of conditions and pressures. But the cost of robustness is sustained complexity, to carry around many systems in case you might need them, whether you wind up actually needing them or not. This is not unique to businesses. It's true of any self-sustaining system. Bacteria are vastly more efficient forms of life than humans on many criteria, but an individual bacterium is much, much less robust to varied conditions than an individual human is.