There is something wrong with the fact that most pro-Obamacare observers are calmly assessing the recent troubles and admitting error, while the opponents (okay, Megan McArdle) are now jumping on being right for the wrong reason without admitting any of the successes.
I will make the fast-one explicit: McArdle implicitly claims that the 2016 status quo is worse than the 2009 status quo. To which I call ideologically-motivated bullshit.
One day she may surprise me with a cogent explanation of why she thinks that to be true. Until then, I claim the reason is a residual desire to believe that government intervention can never do right. I say residual, because she has clearly abandoned that belief as a general principle, but libertarianism, like Communism, is a very tenacious meme in the original 1976 sense of the word.