I am also wondering that is the reason for that?
64GB is not that big as many people think... and I also bought a Sandisk Extreme Pro... which is more than fast for handling the apps...
Next point that make me disappointing, android was castrated, why?
Nokia 8 is now on Oreo 8.1 , and still no option to format the SDCARD as internal memory ...
HMD/Nokia, can you please comment on this one ?
Why are so desperate for more than 64GB for just for apps?
Why you would want the option to slow your phone down is beyond me but hey its your choice, whenever i have used it in the past it always resulted in either a dead SD Card or the phone slowing down. Thankfully my 64GB Sandisk Extreme Pro survived the ideal to live another day.
Whichever way you sugar coat it the speed of an SD Card it is nowhere near as fast or as resilient as the flash storage in the phone itself.