Gamecube was a lot more powerful than ps2, and it didnt get a fraction of the multiplats ps2 and xbox shared.
Its not about system power between nintendo and 3rd parties, and it never has been.
Id be more worried about xbone. It was supposed to be a powerhouse, and it failed to deliver on that end. Hard. And now its public enemy #1 in a variety of ways.ps2 wasn't
The gamecube wasn't that much more powerful, just a little, and some of the reasons for the lack of ports if I remember because Nintendo choose to use the small discs, and there was not enough pressing factories for 3rd party devs or summet, Man seems like Nintendo cant get to grip with the times