I still use the SD card slot; a 2tb SD card holds a lot of data, and it is far easier to pop the card out and in when I want to transfer data than use ANY transmission method.

I still use the headphone jack; I have some nice planar headphones, and would like to keep using them.

I still want a removable battery. If the battery lasts longer, why can't it also be removable? Also, no battery is immune to degredation. It WILL degrade, and I don't want it taking my electronics with it.