WOW, I knew they had zero expense funds but I did not know they had so many that were cheaper...
It would be interesting to compare them over time to see the difference...
So I looked at the chart for Fidelity total market fund (FSKAX) since inception in 1997 vs Vanguard (VTSAX) at Morningstar. Vanguard wins despite the ER disadvantage probably due to better trade execution and securities lending policies. I think you can do fine at Fidelity with their index funds.