A few years ago I bought a nifty new gadget - an MP3 player. It had a whopping 128MB of memory, expandable to 256MB if you bought a bulky add-on memory pack. Sure, you could get hard-disk MP3 players with much bigger capacity, but they were heavy and clunky and would skip if you tried to use them on the move.
Having forked out £180 or so on this wondrous electronic gizmo, I watched in dismay as within a matter of weeks the market was suddenly flooded with new MP3 players that were smaller, sleeker, lighter, cheaper, and held many times more music on gigabyte-sized flash memory.
What have you bought and instantly regretted as technology leaped ahead?