Gary how is not looking after your bits and different from not looking after your negs?
A house fire will kill your negs, just like a lightning strike will kill your harddisk. If anything it is easier to now ensure your photos will last longer than ever before. Just use open standard formats, and use redundancy + backup + checksumming to store them, and diversify their locations to protect them from weather and environment.
Oh yeah? Tried to get data off a 8" floppy lately? How about the wee fact that data is continually changing the format that is is written in, and on. Do those backups also store the OS's, and Apps used to create the data?
Oh wait you said keep it backed up on the latest, so in effect to preserve your data it will cost you a small fortune, be a constant effort to convert it to the latest formats, and rely solely on the 'warehouse' to remain accessible. That is the fallacy of the digital age...the belief that data is immortal.
True enough that paper burns, but have you considered the odds of your house burning down vs computer failure? I respect your knowledge of photography, but in all honesty your grasp of technology sucks!