I don't fly above VNE and don't plan to. But I hear that the most aggressive racing pilots do, often as their average speed! This makes some sense now because VNE is simply based on the testing altitude chosen, not knowledge of flutter (see my post just above this).

So you aggressive racing pilots, you are basically test pilots. Do you share the velocity and height space you've explored without flutter? Or do you just see how fast others with your same model fly? We could define new faster IAS-VNE plots for your model based on your experience.