My point was that there is no writing that extends to long lines. If anything, the fact that no other writing form has made such extensive use of indentation is enough to give me pause and think if that is making any sense. (I do note the amusing lines in the Linux style guide on the use of heavy indentation.)

And looking at this before I hit go. You seem to ultimate be agreeing. Taking opening indentation into consideration concedes that long lines are bad. You just give some room for margins. And are ok with all of the mental stacking that the indentation implies.