It means that Romo himself has said he plans to play another 4 years. It means that Brady, 3 years older than Romo and still playing at a high level (see Peyton too), suggests it may be doable.
If we'd started the search 4 years ago per your suggestion what would we do with an unproven backup with an expiring contract? We for sure would have foregone other talent that is currently supporting Romo's success.
Do I think it's a stupid idea to start the search? No. But I do believe there is more than one way to skin a cat. And I am fine that we to this point have chosen to invest our resources in making Romo himself more successful - and it's working. Now if opportunity knocks this spring, that could be good too.
The Cowboys are not behind NE in finding a successor. Their QB is 3 years older and they now have a 3rd round pick from 2014 that they are testing the waters with.
Whatever...