As a one-time (long ago) silver smith, I can tell you that while there were more than 30 hammers on the wall, there was not one nail-gun. A brief tour of books on subjects from book-binding to leather engraving should demonstrate that there is not a one-size fits all replacement for a tool whose many forms have been developed over centuries (if I handed you a hammer used by a roman carpenter, you would know a.) what it was and b.) how to use it) is just silly. Try making the last finishing cut with a carving tool using a nailgun before you say anything about simplicity...
