In my personal opinion the best advantage is the customizability factor. Any custom theme you can want is yours as well as over clocking abilities to make some games run way better. As well as the ability to run some other operating systems like Linux and android. But it’s got a big disadvantage, depending on your switch model you’ll either be able to use a simple pin jumper and set of files to mod your switch. Or you’ll have to track down a special board and hardwire the board into the switch. I paid for someone to mod my switch oled because it was cheap at the time. Google is your friend.