As for me, I often find iPhone writing productive because it's hard to edit on an iPhone, whereas on a computer I'm encouraged to tweak, move sentences, reorgan

As for me, I often find iPhone writing productive because it's hard to edit on an iPhone, whereas on a computer I'm encouraged to tweak, move sentences, reorganize, etc. The distinction between writing and editing phases is profoundly important, I think, and computers generally destroy it. (I've started to write texts by chatting with myself as a way to suspend the inner premature editor.)