are removable SD cards and batteries REALLY that important?

Think about your device you use in the real world. how often do you swap out your SD card or battery. Whats on that other Sd card thayt you can't put on your existing or upload to dropbox? how often do you swap out batteries? If the Razr can have long battery life why can't others? if this really a problem for geeks or is it an over all general problem.