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!
But how long did it take you to get there? I think the point he was trying to make is that GIMP has a steeper learning curve. If you’ve never used krita/pinta/etc, but you gave a lot experience with GIMP, then yes, GIMP will be easier
One time I was creating custom Arch Install media, and I thought I had mounted the USB drive’s partitions, but I had actually mounted my own system’s partitions. When I ran pacstrap, it actually ran on my own system, but, by some miracle, didn’t completely nuke it.