It's useful if you want to copy, say a bulleted list over, or keep various bold/italicized words. I would say it's usually 50/50 whether I want to keep the for

It's useful if you want to copy, say a bulleted list over, or keep various bold/italicized words. I would say it's usually 50/50 whether I want to keep the formatting or not. But either way most applications support both copy with formatting and copy without formatting.