I just explained my reasoning. If Sony was running somewhere in the 4% profit range during the PS2 days, MS and the 360 (which was much less successful, had an unprecedented era of failure issues requiring MS to pay for replacements, doesn't have a presence in as many markets, etc.) Has an even lower chance of making much money. Revenue? Sure. Profit? Not that much, if any.
Another contrast is that Sony wasn't paying for many exclusives back then. They were the de facto home for most console games. The pull was so strong that even when a developer like Mikami wanted nothing to do with the platform, his game ended up there anyway.
This was my feeling long before that article.
No matter how you look at it, even if they somehow ran a business that evened out in the black, it doesn't come anywhere close to approaching the profit of initiatives like Office, Windows, Azure, and so on. Even a lame duck like Windows phone has more potential to interface with their existing profit centers. Xbox supporting Skype doesn't really help, that hasn't been a big moneymaker either.