To play backups
To play oldschool games ps1/ps2
To be able to watch mkv format movies with dts sound.
(Using tsmuxer was a pain in the ass everytime to split the files into 4gb M2TS partitions)
(Same goes for that program of which I forgot the name that allowed me to convert DTS audio to AC3)
But 85% of it was essentially to mod GTA V hehe...
Had my first encounter with modding back on GTA 3 on pc when I was in my early teens.
I wanted to experience that feeling of video game freedom again.