After such a period of uninterrupted power and popular support, actually increasing their share of the constituency vote at each election, it would be easy to excuse the thought that the SNP had earned its political success by bold promises, and then delivering on them, changing the face of Scotland in the way that some multi-term governments have done for Britain. The reality is somewhat different, and the fact is that not only has the SNP repeatedly made very few specific electoral promises, as compared to broad brush claims of societal transformation, but when they have done so they repeatedly fail to achieve what they promise.