4 ms·I like to think of the younger twin as a backup copy, in case the older twin becomes lost or damaged.by qntm 16y agoI like to think of the younger twin as a backup copy, in case the older twin becomes lost or damaged.ceejayoz 16y agoThat's gonna leave a mark.die_sekte 16y agoBut do you keep the spare one in a remote facility, to secure yourself against natural disasters?