You can see my SMART data here Testing out your hard drives via SMART checks - #11 by codinghorror
For a single plot (by that I mean constantly writing a single plot, not parallel, but sequential), on a 970 pro, it went from 91% good to 85% good over a period of 35 days … so every day you plot, for each plot, that is -0.17% endurance for this particular model of SSD.
By my math, that’d require ~583 days of continuous plotting, to get from 100% to 0% good?
If you were doing, say, 4 plots in parallel then it’d be 583/4 = 145 days to get from 100% to 0% good.