My 4cents. I added 2 for inflation....

When having problems in measurements, adding another dimension from somewhere else aids in inspection. It is used and is in relation to the other measurements. I say use both systems. Dr Cobb devised a simple method as some measurement criteria needed to be devised years ago.

Focal points in optics can present problems in accurate measurement. Problems arise viewing across flat surfaces and 3 dimensional shapes. Objects can appear larger or smaller dependent on focal distance.

Measurement under a few degrees is and will continue to be difficult unless there can be a physical method of measurement that's accurate and then averaging over a period of time to account for daily movement.

ALDT does not show the severity of the cobb angle, however it is an easy way to gain another dimension which is useful.

This will help explain.