Insecurity I like my things, electronic and otherwise, to have a reasonable level of security.
Irrationality What is magical about the number 26? What if print books self-immolated on the 27th checkout from the library?
Proprietary Electronic items of a proprietary nature have a shorter functional life than open ended electronic items...which are transitory enough IMO.
Just my personal opinion....but am glad to see I'm not alone.