Native stereoscopic capture has massive labour costs itself, and there were many issues where one eye had corrupted footage or imperfections, so the insurance paid for the footage to be post-converted from the one good eye anyway.

Even where it went right, it more than doubled the size and weight of the camera system, and changing a lens would be a complex process taking 30 minutes instead of the minute or two normally required which significantly reduced the material that could be captured in a day. Post-production labour is far far cheaper. So post-conversion very quickly became the norm.