Finding this discussion interesting, including the 'fear and trepidation', as expressed by some, I strongly feel that practicing ejection procedure (along with the
rocket propelled seats) definitely
saves the spine. Having seen the spinal injuries caused by the older generation Russian seats (KM-1), I suppose MB still leads from the front in saving lives and spines, though the latest Russian seats are as safe.
One may like to read the more about ejections at
Project Get Out and Walk...
Happy Landings :-)