Original Message

Ground speed.  

If you're that paranoid about any particular emergency making an abrubt end to your life, then perhaps you should not break the bonds of earth.  Your ability to see more suitable locations for landing emergencies is enhanced by altitude.  Your rection time for most emergencies is increased.  Depending on your location, your burn rate is decreased.  Those 1500' and lower towers are no longer a factor.  Turbulence is significantly reduced.  Cooler temps for those that do not have a/c. ... The list continues.  These are but a few.