That right there. The Viggen only sold because it brought brandnew features like an A/G-Radar, Anti-Ship Missiles etc..
But, according to you, the appeal of the T-2 lies within its carrier capabilitys, something which the A7 can do too, and even more.
The T-2 is obsolete, because it would not bring anything new to the table, which couldnt be done by airframes much more capable. I mean, its fine if you have that kind of love for it, but from a company's perspective it would be just uneconomical, sorry.