Agree with Cybertec. It has nothing to do with user profiles, although I see how one could think that. In the free and open Android enviro, one user could access the content of another on the card probably.
But I agree they are doing this strictly for the cash. Charging $50 or $100 more for an extra 16 or 32 GB of storage when it probably costs them $9 to add it = win win for the company. As Apple has been doing since the beginning.
I will never buy a phone with out a memory slot. I like to speak with my dollars. Google is hoping eventually I will have no choice. And eventually I probably won't. But for now I refuse to support a company that doesn't use SD cards.
Makes me sad, too. That was one thing Google/Android devices ALWAYS had over Apple.
Microsoft phones still have Mem cards. But for now I can count on Samsung an LG.