Bill Tindall, E.Tn.
I suppose the longer blade made sawing it quicker.
I have not been able to saw shoulders so I chisel them.....That said, I probably can't saw shoulders because I only practice chiseling them. so much to learn, so little time to learn it. I still struggle with M&T joinery to get it near perfect. I have an easier time with dovetails, for whatever reason. Maybe because I make more of them.