Shower thought: after some inflection point, does your likelihood of survival actually increase with altitude? With the additional height you gain additional time to plan and travel to fall more optimally, while your acceleration should fall to nearly zero.
Of course, there may well be a secondary ceiling (pun) where air pressure and O2 create new complications...
Of course, there may well be a secondary ceiling (pun) where air pressure and O2 create new complications...