You leave a networking event with a handful of cards. A few days later they are still on your desk, and the conversations behind them have already started to fade.
Every card is a conversation you meant to continue. Sitting in a pile, none of them are searchable, none of them are scheduled, and the reason you connected is nowhere on the paper.
One system, one contact record. Open anything below and keep going from there.
The real value was never the information printed on the card. It is the relationship you build afterward, and that only happens if the card makes it into something you actually use.