One of the first computers I used was a Cray Y-MP. Now the PC on which I am typing this post is about four times faster, but I miss the Cray. I could take a nap over it, try doing this on a laptop now!
You probably never owned a mechanical watch...You know, one of those little devices powered by a mainspring, that needed to be recharged once a day. Owning one of them gave to the owner the feeling of how precious and unique is the time of our life, a sensation that seems to have been forgotten by the i-something generation.