I would imagine several reasons for paper negatives, tho maybe there are
more...
sentiment/tradition -- this was a popular style in the '30s, with much
pencil "working up" of the original.
retouchability -- on fiber paper anyway, you can pencil away to yr heart's
content, especially on the back..
you can use *variable contrast filters* !!!!!!
some people might not have Freestyle in their back yard, and/or have an
old box of paper to use up
paper might be easier handling for collaging, retouching, rescanning.....
that's MIGHT !
plus of course, now "paper negative" includes laser, ink jet, copier, etc.
and becomes almost a must..
But Liz, what did you have in mind?
Judy