Originally Posted by CaseyBessette

Some volumes are less expensive, some are more. One practical concern I have with a digital library is that technology changes. If Libronix/Logos as a company ceases to exist, then after 5-10 years, so might your ability to run the software. Eventually every book you purchased and unlocked will become inaccessible. A physical book will never become technologically obsolete and can be easily passed on to posterity. Ten years ago Windows 98 was important, the rage, brand new; now it's obsolete and won't work on new hardware. When I buy an expensive reference work, I want it to be accessible to me the rest of my life.