One extremely important thing to note about 2024 turnout—it was only down in uncompetitive states. Turnout was, on average, higher in swing states compared to 2020. Democrats did not 'stay home' in the states where it mattered and you should ignore anyone trying to explain Harris's loss that way.
That said, it feels kind of squicky that it's WaPo and the University of Florida presenting this. Given their exciting editorial turnabout on the endorsement and Flordia being Florida - eh.