It’s nice to have a live machine to transfer data from when you’ve purchased a new computer, but the tedium of doing the actual copying and pasting gets to be old. For example, “copy these picture files to the external hard drive; unplug the peripherals (including the monitor) from the old machine; plug them into the new machine; restart the new machine so it recognizes the monitor and mouse and keyboard; drag the files to the appropriate place on the new machine.”
I know, I know. “Get a second monitor!” What, you think I’m made of money?
Then there are the application programs that came with the printer, for example, but are not free when you want to download them to the new machine. Both PaperPort (scanning software) and the Brother Control Center will have to be copied and reloaded (hopefully without incident) from the old box.