Frankly, I hope not. The use of dashed slurs is one of the scourges of modern vocal music. They make it harder to read and add nothing. Look at old hymnals to see how this was done for centuries.

Dashed slurs should be used for critical editions to suggest edits not found in a manuscript or urtext. There are bowing articulations that require them, too. Otherwise, make it easy on singers and don’t use dashed slurs.