I'm not doubting the ability to extract crazy out of it - it's built tough - but it all comes down to financial constraints (or lack thereof).
Sure, nothing stopping me from having bought a 3RB and slapping on a K2 supercharger on it, best of both worlds, but that's going too far down the path of "don't do forced induction on a car that doesn't have forced induction to start with".
That's like seeing the 400hp Hyundai Excels - respect but meh, not my cup of tea.
EZ is a much better designed motor than the EJ. Comes with 20+ years worth of engineering and plenty of Porsche input. If you know what to do, you can pull quite good results out of them (there is more to life than kW and peak power).
Superchargers - for the most part - belong in another era.