My grandfather was a carpenter working in a factory that made piano benches. He worked there his entire career. He was in his early fifties when he retired and

My grandfather was a carpenter working in a factory that made piano benches. He worked there his entire career. He was in his early fifties when he retired and was actually retired longer than he worked in terms of time, and when he died he still had 6 digits in assets (not including his house.) He didn't do anything special except live modestly, save, and buy stocks. Who can say they'll have the same experience working a blue collar job today?