Quote Originally Posted by RalphLambrecht View Post
the advantage of being able to dodge and burn differently during the two exposures makes split-grade printing a valuable technique, achieving effects you can't do otherwise.
Dodging at a different contrast grade is a definite advantage to split grade printing - the thing is a royal PITA with single-filter printing.

Burning at a different contrast grade can be easier with single filter printing. If the burn is to be at other than #00 or #5 then two burns must be performed, and figuring the ratio of the two split-filter burns can be a bit of a nightmare.

Burning at an intermediate contrast grade with split filter printing is more easily done with fixed filtration.

For production printing, running off a set of 20 identical prints for instance, it can be easier to find the fixed contrast grade equivalent exposure once exposure and grade have been determined with SG techniques.