It's one of the things I'm considering, certainly although I rather agree with their reasoning TBH - I had an old android 2 phone with barely any internal storage and having to constantly move stuff between internal and SD storage was a major pain.
However the new way of doing things makes getting a large mass of data (e.g. music and movies or lots of photos) on or off a bit of a pain. I didn't know about the transfer app Veato mentioned unfortunately and Sony also do their own app for the same purpose on a Mac.
I still need to actually get my hands on the HTC One and the Xperia before I make my mind up. The former isn't due in the shops for a couple of weeks.