Wharnecliff blades are good for most practical city use. The corner on the point allows force to be concentrated when cutting rather hard thin material. That fits a lot of packing materials like plastic or fiber-reinforced tape, vacuum bags, or blister packs. Basically they do well at the same types of things as a box cutter. They also work well making shallow straight cuts like an X-Acto Knife. Because they tend to make arbitrary straight cuts they are less ideal for skinning animals or separating animal tissues along their natural margins. The Wharnecliff will ignore the boundaries and cut across party lines. They are good for cutting around body openings for taxidermy work however.
They are less good than you might expect for self defense since they kind of bind if slashed across heavy material. That is another application that works better with a blade with belly.
The narrow tip is a little weak for my taste and I prefer a sheep's foot blade instead. I think of these flat-edged blade types as very good city utility blades.