I know a lot folks don't like Zitron's polemical and sarcastic tone, but I think this piece is worth reading regardless. Despite his tendency to oversimplify, this is one of the best analyses I've read on the SaaS market.
Plus he gets in one incredible groan-worthy pun:
> As a result, it's just cheaper to use Microsoft's faux-Tableau no matter how hard it Tablows