Tania, hmm yes technology. Who remembers floppy disks? What?? We would need to think about average time interval of technology leaps vs. the lifespan of the individual making the plans. Do I outlive the medium I have used??
Ah Kay you've just introduced another really good notion - that of a contact hierarchy, particularly if you nominate more than one 'care companion'. I'm sure we could have some 'business rules' than could function in the background to put this hierarchy in place.