Everything you listed can be done, and I'd argue, can better be done by a per to peer exchange-based market. Market actors specialize based on comparative advantage, which is manifested by input costs and output revenues in the market. Within a company tasks are ascribed by the entrepreneurs, they're inherently inefficient. And it's interesting you mention scale cause it is precisely company that sets the limit, without it, the scale of an industry is the extent of the market, which can be viewed as all the companies in one industry combined.