I've given cables away... New phone same cable, after a couple years, it soon mounts.
I usually buy new cables anyways cos the free ones are shit, and too short, for any practical use.... Well unless you don't mind charging the other side of the room!
Cos I've always gone for the top spec fone, As I use most of its features, and to get a better camera‽
Jane (my fiancée) has never had a brand new phone, or even a decent one... Not til I bought her one this year. So she is still on micro-usb, and I've been on C for a couple years already. This means she has non-use for "my" cables, and wouldn't know the difference, if she did by accident. She would, ask me if "so n so" cable was ok for her to charge, but that's it.
So my cables are safe..... For now!