Color Stability of Modern C-41 Process Films

[aloha]

So, I bet this question has been asked before, however I quick search didn't get me the results I was looking for.

So, what is the color Stability of Modern C-41 Process Negative film like?

 

[AgX]

There is no independant research on this matter of current C-41 films published.
Nor do the manufacturers do more than vague statements.