It pays, therfore, not to rely on just one card.
Bring back Eurocheques, that what I say! Much more simple and allowed much greater flexibility. When sailing (when we find really out of the way little bays and villages) it's not always possibel to find ATM's, places that accept credit cards or, indeed, places to change travellers cheques. Always managed to use Eurocheques though. (It is, however, getting easlier to find ATM's but you need to head for the bigger isalnds and the biger ports.)
The cynic in me is inclined to believe that the banks weren't making enough money out of the system, so they pulled the plug.