This is not a financial question. Over a half century what affects the ability of a portfolio to continue to provide real positive return indefinitely is not the initial withdrawal rate. Instead, it is technology, global politics, war, mother nature, taxes, economic collapse. Regardless of the beginning withdrawal rate, opportunities will present themselves that will allow for major portfolio calamity or enrichment. How the portfolio responds to these situations is the critical factor.
A low initial withdrawal rate - less that 2% - seems important not so much because it is more sustainable but because it points to a buffer or reserve that can withstand substantial loss but still take advantage of unexpected opportunity.
A low initial withdrawal rate - less that 2% - seems important not so much because it is more sustainable but because it points to a buffer or reserve that can withstand substantial loss but still take advantage of unexpected opportunity.