To be honest, the academic field is about the only field in which it perfectly makes sense to finish a degree, I mean, what else can you boast with if you have none?

The other three reasons are visa (proof of "ability"), wanting to work in government (if you really, really want that) or early-stage startups that need Ivy-League credentials for their investors, because they don't have anything else to offer.

Other than that, as a software engineer in the private industry, nobody will care about any of your degrees.