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Hm, that makes me wonder; is it possible to demagnetize or scramble the data on the mag stripe without harming the chip? I'm not sure how sensitive the chips are to magnetic interference, but if you can pull it off, you can make your own chip-only cards.

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There certainly is. I have done this with a non-payment card. All you need is a magstripe reader/writer. A few tens of passes of writing random data to the magstripe should do the trick.

Not sure how this would impact the usability of your card though, in case you do end up relying on the magstripe.

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