I want to probe your definition a bit. Let's say a factory makes gears. All the broken ones get recycled. After all quality checks have been done, some of the passing gears are pulled off the line and redirected to the gift shop to be sold as paperweights.
1. Are unsold gears in the factory storeroom fit for purpose as gears?
2. Are unsold gears in the gift shop fit for purpose as gears?
2a. If yes, do they lose that fit at the moment of sale?
2b. If no, do they regain that fit if the factory has production issues and brings a crate back from the gift shop to sell as gears?
One is a device sold with a specific purpose that the buyers knowingly paid for, the other is a piece of isolated pieces pluggable hardware.
https://www.youtube.com/watch?v=3S5BLs51yDQ
“with iPad Pro + iOS 11, a post-PC world may be closer than you think.”
https://9to5mac.com/2017/11/16/ipad-pro-whats-a-computer-ad/
I think you'll find that you will quickly exhaust the max character limit...
Sounds like a general purpose device to me.