No...If a developer/client decides to stick with VFP for the sake of sticking with VFP and not going to .NET - that in no way diminishes what can be done in .NET.OK. In that case, one might observe that if a developer/client decides to use Java/Oracle for the sake of using Java/Oracle- that in no way diminishes what can be done in VFP.
The two propositions are logically equal; except you scoff at one and use the other yourself as a shining example.
IME, without knowing all the parameters that contribute to a determined decision, all one can apply is bias. Naturally that is just an opinion, though I believe that particular opinion was shared by several of your nation's founding fathers- as you would presumably know better than I.
"... They ne'er cared for us
yet: suffer us to famish, and their store-houses
crammed with grain; make edicts for usury, to
support usurers; repeal daily any wholesome act
established against the rich, and provide more
piercing statutes daily, to chain up and restrain
the poor. If the wars eat us not up, they will; and
there's all the love they bear us."
-- Shakespeare: Coriolanus, Act 1, scene 1