The more tissue there is, the more depth that can ultimately be created per standard penile inversion. I know a handful of women who have gone through the process, those with smaller initial material ultimately went for zero-depth vaginoplasties because creating a sufficient vaginal canal would require a more involved surgery. Fortunately the ones who received the zero-depth are both lesbians so penetration wasn’t as significant of a desire for them as just getting rid of the nope rope.