it's really nice to be able to just pop a nail in when you've got things
aligned rather than worry about hammer blows knocking things around.

then again there are situations where no power tool is gonna do what a
chisel or block plane can quickly do.

they are complements to each other

w/regard to power tools in automotive shops... well using them once pretty
much dictates using them again and you can feel pretty silly after nearly
giving yourself a coronary trying to get a lug nut off by hand and watching
it come off easily w/an impact wrench.