Korriban is a planet steeped in the dark side of the Force, is home to the ghosts of many powerful Dark Lords of the Sith, and has been used as the seat of power by various Sith empires and organizations, yet at no point in the thousands of years of struggle with the Sith did the Republic or Jedi ever consider nuking the planet to oblivion.

It’s almost like Korriban was originally conceived as just a mausoleum world without any strategic significance to the Sith – a world neither the Jedi nor the Republic ever had any great knowledge of.