- CD-ROM -> Bigger hard drives, faster internet connections.
- Floppy -> CD-ROMs And BIOS upgrade
- Flash -> Better browser security, and faster javascript
Now for headphone jack, we have bluetooth. Slow, unreliable, requires to charge an extra device, when you run out of earphone battery, you are done listening. If you use the USB/Lightning to AUX, you can't charge your phone at the same time.
If lose the earpiece, you pay premium to replace it.
Also: I can't watch a video with a half-second audio delay. Half a second is being generous.