I know @
Ninjin has been doing this for a number of months for track use. Ideally he is using it for the reason of not having to shift for a short duration during a track session. Not so much for power gain etc. I have been working with his car and seen little reason power wise to go beyond 7600. With the exception of "saving a shift" when you just simply need a few hundred RPM more on a tight course. I am sure he will be able to chime in with longer term results for reliability in the coming months.
I personally am doing minor valve train upgrades in my new engine in hopes to handle upwards of 8,500RPM. I don't plan on going anywhere past stock but am building over what I need in the case my turbo spools too slow so i can have a longer usable powerband. I plan on setting the rev limit to 7,800-8,000 regardless of powerband for the same reason as @
Ninjin, but have no reason to otherwise shift anywhere above 7,200-7,500.
I am curious to know about others long term reliability as I know a number of tuners have been raising this rev limit for a while now.