Not sure about the other ones, but I use Btrfs because of subvolumes and backups.
Subvolumes are like special folders inside of your partition that mount separately. Ex. In my btrfs partition, I have a @home partition that is mounted to /home
This makes it easier to choose what you are backing up, because you can say, “just copy everything in @home to the backup location”
If I got any of that wrong, feel free to correct me!
At one point I had the coolest Ventoy USB; CyberRe, LABEL=hakr. But then I got a new computer and apparently the ssd was /dev/nvme0n1 instead of /dev/sda. While I was installing Arch, When I created a new GPT partition on /dev/sda, it wiped my beautiful Ventoy 😢