Does frugality still work? If so has it changed?

I learned a lot from my grandmothers. One ran a business with my grandfather and the other invested in dividend stocks. They were both ahead of their time in the 60s and 70s. I remember my grandmother showing me her stock certificates and explaining how dividends worked. She explained how she used dividends to support herself after my grandfather Tom passed away at the age of 58. I remember the railroad and utility stock certificates with their elaborate etchings and visiting her stockbroker to execute a trade well before computers arrived.
I didn’t get to really meet either of my grandfathers since they both died young. I did spend quite a bit of time with both grandmothers, either staying overnight or while visiting cousins nearby. By the time I was a young man, they both had lived through two world wars, the depression, Vietnam, the Womens and Civil Rights movements, the Kennedy assassination, 1973 and 1974 energy crisis, inflation, cold wars, and multiple recessions. As savers and investors they had seen some setbacks.
