I don't like articles like this for two reasons: (1) they trivialize actually building a company, growing it, and selling it, and (2), they provide comfort for those that don't have the drive/luck/privilege of getting there by arguing that "hey, money doesn't make you happy!" First of all, as others mention in the thread, this is hardly an example of an "overnight success" -- there are no such examples, barring a few…
While this might not be the case for the author here, I think in the startup scene (and thus for the HN audience) it's not all that uncommon for people to go from "very well paid engineer" to "FU Money" overnight and for reasons not related to their actual engineering prowess or effort.