Plugs are the old 5 hairs at a time bunched up and planted in the scalp giving the Barbie Doll look. Now it's done one hair at a time, each hair planted in the scalp taken from a graft of hair on the back of the head. The latter giving a natural look unlike the old Barbie Doll.
Correct, 15 years ago they did "punch" grafts, which were 1/4 inch round grafts they "punched" out.
Today they do "follicular unit" grafts which is how hair grows.
Hair grows in bundles of 2-5 hairs-a FU, they cut a long strip out of hair about 1/2 inch wide and 6-10 inches long and disect out the follicular units.
Thats it,