Importance of wireframe overlay by Nicholas bishop

wireframe overlay was introduced during the development of skin modifier for better visualization of the topology during handling of the vertices, but this goes beyond by modeling I realized its potential when working with triangles and ngons, I can visualize how will be the geometri wen collapsing or welding edges, for this to work must have applied a subdivision modifier to the geometry.

test it and you will see how usefull is, here is some example and tut

An example of the visualization

I agree, it can be very useful.