>>3768545>Reduced contrastThe tonal gradient is more complete in low-element lenses, it makes images low in contrast but in post-process they are useful when modifying colors as there's more real variation in the data. Also why sometimes it looks less sharper, not enough black and white contrast points.
A corrected, high contrast lens with tons of glass will pull an image directly SOOC but when editing they have some problems, blacks are more prone to be crushed and color variations start to become choppy when pushed moderately. Also the sharpness is rendered in a one-dimensional plane, rendering DoF separation very abruptly and making subjects look "flat", although i think that's more about element design rather than element count.