Sorry, I edited my last post to clarify that I meant the NSX is aged, not Lexus/Infiniti.

I think the NSX has plenty of connection with the rest of the Acura line and somewhat Honda. The NSX's engine is basically used in other Honda products. The NSX's VTEC system was trickled down to all of Honda's line.

But the point was, a flagship or an icon model represents a lot on the preception of a brand. A Lexus' flagship LS430 and SC430 model really focuses on luxury and less on sport. Infiniti's flagship Q45 focuses on techno gadget stuff and comtemporary style. Acura has the NSX as an icon and flagship to represents the reliability and performance of its brand. Just like how your mother sees the Lexus brand because of her perception on the flagship model.