The upper limits on the fraction of apparently featureless discs identified by GZ CEERS as a function of redshift. Featureless discs are identified as those with GZ CEERS vote fractions, |$p_{\rm {feat,GZ}}< 0.3$|⁠. Whereas F23 visually identify discs as those galaxies with an expert disc vote fraction |$p_{\rm {disc,F23}}>0.5$|⁠. The angular diameter distance is also shown by the dashed line using the secondary y-axis on the right. The data is split into redshift bins with the same number of galaxies per bin, and the points are plotted at the centre of the bins. Upper limit arrows are scaled to show the uncertainties on each calculated fraction.