Their abysmal track record? Are we still talking about the biggest, most successful software company in the world, which made all of its mountains of money using exactly this pricing strategy?

Yeah. I mean, just look at this graph!

http://upload.wikimedia.org/wikipedia/commons/0/0d/Operating...

See how no one uses Windows anymore on supercomputers?

Seriously though, the only reason Windows 7 lost market share is because Windows 8.1 came out, according to http://www.statista.com/statistics/272667/market-share-held-...