Of course it's arbitrary, that's why I said it wasn't a troll but just my... feeling on it.Install base matters up to a certain point. A system that flops like the Wii U necessarily limits the sales potential of its games, even if it is not a linear correlation. To the install base argument you can also add that a large part of the Switch audience is likely Wii U owners with a special interest in Zelda, meaning that the sales of Zelda will probably skew away from WiiU. If Switch takes off, and it starts to have several dozen million user base, we can take another look at BOTW and FFXV and see how they match up (though the comparison to me is quite arbitrary), especially since both games will have been able to show their legs as well.
I could actually use other games in this comparison. Just took a recent one that sold enough.
I agree with everything you say here.