It really all depends. If everything else works fine there is no need to. Sometimes though you have to download the LAN drivers even to be able to plug in a network cable if you're going to access the internet that way. Same for WIFI and Bluetooth... if they work already after the new install there is no real need to download them. ASUS has just determined there are some possible issues or problems and has released newer version of the different drivers. So it won't hurt to install them if you have the time.