I used to write by hand, but I prefer typing as a faster input method. Typing a word is a second or so faster than writing it by hand, and when you're writing tens of thousands of words, those extra seconds really start to add up.

Of course, if writer's block is far stronger for you on a device than when writing by hand, the speed issue balances out, and maybe even overbalances in favor of handwriting. But I prefer to address writer's block with a paradigm shift ("Give yourself permission to write junk") than with a technique shift. Plus, I really believe that using Scrivener has become an essential part of my writing process. Its organizational tools help me keep all my worldbuilding in order, and I love the "well-equipped" feeling I get from having all my material readily accessible in a single program built solely for writing.