7 advantages a late starter has over the FIRE world in saving for retirement

Everyone knows they should start saving for retirement as soon as possible. What people know they “should” do and what people actually do is not the same thing. According to AARP , nearly half of American households headed by someone age 55 or older have no retirement savings. What is someone far behind on retirement savings to do? Can they learn anything from the FIRE (financial independence, retire early) community?