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The magsafe is really cool but for anyone interested in the wallet accessory just be careful with putting NFC chipped cards there. Paying with Apple Pay from your phone could get confusing.
I tried a few months back to pair down as many cards as I could and just couldn't get under 7 (medical, CC, ID, Fleet Diesel Card, Insurance, etc.) I don't know how people get it down to 3-4...
Any cards which are specific for driving (e.g. fleet fuel, insurance, physical license as backup, etc) could live inside your car in a "driving wallet".