BraceMaker, Scott Ellis was a major driver for Ski Flying at it's inception. There were some immediate problems as some sites could not accommodate the wider widths and longer outruns. Scott had plans for modifications for existing jumps if my memory serves me correctly.
One of the big advantages was, and again this is just from memory, was the angle was reduced for the ski fly ramp vs the traditional at 6'. Much easier on the knees.
It was an interesting experiment and I believe they even did it at the Masters one year.
All I can say is just because you can doesn't mean you should. The falls in Open division jumping are vicious. Add speed, add height, 90" skis, thin margins for error. Late cut, wind gust, any one of a million variables and big injuries can happen. My personal opinion is I just don't see the need.