Nintendo has, since the Wii, shied away from bleeding-edge or custom components, preferring to use cheaper, proven tech that they can more easily maintain but is still strong enough for their needs. Just look at the Switch -- it uses the Tegra X1 in a device that launched in March of 2017, despite the X2 having been available for more than a year.

Apple, on the other hand, has been running rings around Qualcomm and other ARM vendors for a while now, and sharing tech makes it all the more important that they continue to be competitive.