Converting from single master cylinder to duel ?????

My only reason is safety. With the single cylinder if you blow a line you loose all brakes. With the duel in theory you only loose half you brakes. If you blow a front line you loose only your front brakes. If you blow a back line you loose only your back brakes. Were I live with windy twisty up and down roads it will help me sleep a little better at night having it!