I'm probably wrong but maybe there are no markings on 805 and smaller
SMD capacitors because only a very few of us would be able to read the
writing. Possibly something new and radical like a series of colored dots
would work, but still problematic for us ancient people.
I have a small isolated-tip tweezer with flexible test probe type leads and
banana plug connection to a capacitor meter. Once I got used to the
equipment this lets me spread a handful of SMD components on a plastic
serving tray and quickly measure anything that looks like a capacitor.
Also works for resistors, and other measurable components.
These are then dropped in a fold of paper in order of value.
With a little practice this becomes second-nature and supports quick
sorting and easy circuit board assembly. Measure the value with the
tweezer tips open, then measure again with the component held in the
tweezer. Difference is actual component value with stray capacitance