I wonder how much is lost or gained by writing a different document (.lit) than one reads (.html). E.g., how much would a LyX-style (http://lyx.org http://lyx.

I wonder how much is lost or gained by writing a different document (.lit) than one reads (.html). E.g., how much would a LyX-style (http://lyx.org http://lyx.org) editor contribute? I'm sure it's been discussed before, but where?