Would be interesting to try and quantify the "lost images" over time for both approaches to figure out which is better
lol, yes I guess it would, but I suspect youd miss more images with your head in a book figuring it out than youd loose in a lifetime of either method.
I suspect this balances out over time, more small cards means greater chance of individual failure. Estimated failure rate would average 3.5 years+.
So far I havent had one fail myself.