Is Primavera a valid single solution answer for earned value management?

Particularly in the US Government contract environemnt, Primavera is used alongside a "cost processor" for earned value management. The cost processor (like PRISM or Cobra) performs time-phasing, budgeting, etc. and in its most basic form can be fully functional by receiving nothing more than dates from Primavera. (Note that many comapnies use Excel or some custom software to do the cost processing).

In this environment Primavera may be under-utilized, but I am not aware of any companies that compete for instance in the US Government sector (which is highly regimented) by using ONLY Primavera.

So, in a broad and intricate project controls set-up (for instance, the type that would be required to manage a >$50M EPC project) is Primavera a valid single solution earned value tool?