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if you do it properly, DOFs remove jagged edges and make everything look a ton better than normal screenshots
Depth of field screenshots have one area that is in focus, while everything in front and behind that is blurry.
Removing jaggedness is a side effect, rather than intention, of this process
It's to prevent you from accidentally timing out other connected clients.
This. On slower computer, it can take several seconds, and connected clients lag throughout the process
