Disk fraction for the TNG simulation measured with three different threshold criteria, $\lambda /\sqrt{\varepsilon }=0.31,0.71$, and 0.8 in red, green, and blue, respectively. As we move toward higher stellar masses, the fraction of disks decreases smoothly, with a significant decrease at log₁₀M_⋆≥11[M_⊙], reaching values of ∼0 for log₁₀M_⋆≥12[M_⊙] regardless of the selected criterion. The results for $\lambda /\sqrt{\varepsilon }=0.71$ and 0.81 show little disagreement.