The zeitgeist has shifted? The zeitgeist hasn't changed since 1847, when Marx wrote about the character of monopoly in The Poverty of Philosophy. It hasn't changed since President Harrison signed the Sherman Antitrust Act in 1890. It hasn't changed since Standard Oil was broken up in 1911, over a century ago (with Standard Oil of New Jersey and Standard Oil of New York recombining in 1999, the broken up monopoly come back to life).

It hasn't changed since the breakup of Ma Bell in 1982, the Baby Bells having re-formed into two companies: Verizon and AT&T, who control the last mile of wire and wireless, the network neutrality of which they have been fighting against. It hasn't changed since the big eight accounting firms became the big four accounting firms. It hasn't changed as Google and Facebook swallowed up all online advertising, search, social networks etc.

The idea that the zeitgeist has shifted from monopoly is absurd. Billionaires from Warren Buffett to Peter Thiel seem to think otherwise. In every industry, mergers and acquisitions leave an increasingly fewer companies with control of more and more of their markets. The data is out there and quite obvious, you really have to put on some kind of ideological fantasy land kool-aid trip to see otherwise.