Hey I think there is a misundertanding here.
Nobody says a FWD is a good solution. AWD is much better.
BUT is is expensive and needs gas...

Off course, everybody who really know and appreciate cars, who like to drive them fast, or who know the real difference between FWD, AWD and RWD will order a Quattro. Fot these people, FWD is just not good.

But lots of buyers of A5 buy it because 1) they have the money 2) they find it beautiful, 3) they like the image of Audi.

They just don't know what it means to be a FWD! Sometimes they order a Quattro, because it is more Audi like that, and they think it increases the safety. For these people FWD is not an issue.

So, I think it is not really a problem that the A5 exists as FWD.

However the bigger motors will have traction problems, so they need to be automaticly associated with Quattro.

I think it is the case, a 3.2 FSI is always Quattro I think?