It also helps that (generally speaking) the first party games have great gameplay where I can forgive a bit of graphical fidelity. I'm not so concerned about how detailed a track is as long as it looks decent while I'm power sliding my way into first place

They did a great job with the tracks on MK8 and in single play performance is great. If you do get a local 4 player race going then it can get a bit framey, would be nice if they dropped a bit of the detail in that instance to keep frames up.