[CamelCaseName]

All it takes is one remarkable variable -- age.

The same values taken for a 50 year period are only $1.65MM, nothing to sneeze at, but a far cry from $8.2MM.

[kbutler]

This is overly dismissive. Age and duration are important, but the saving is also necessary.

100 years of living barely within your means won't leave $8.2MM or $1.65MM.

[ascorbic]

Never retiring, so never drawing on the principal is going to make a significant difference,