Are any of your cards still magnetic? In my wallet all bank cards use chips, other cards (subway tickets, etc) tend to be wireless/NFC, the remainder (IDs, licences) are either nonfunctional plastic, or chips as well.
OK, in travels some countries probably still try to read the creditcard magstripe, that may be a problem for a part of population. Otherwise it's just like worrying about the macbook demagnetizing your floppy disks..
