Speed and convenience against money, with other considerations thrown in such as reliability and data retention. I think it will be a time before I get rid of my 3 and 4TB USB external drives for backup. The 1TB USB2 external drive is a bit of an embarrassment, but it has backups of the thin clients I was into playing with a couple of years back.
A lot of discussions on this site boil down to money. If no one was allowed to comment unless they had a personal fortune of $500 million, it would be very boring. "My 8640B has died, the display is playing up, what should I do"? "Either throw it away, or get your chaps to sort it out. They should be able to find one in as new condition for $5,000, and if you are seriously interested in RF sig gens, $30,000 should snag you something better than that in every way. Why are you wasting our time with silly questions?"