> Ever try to read a physical book passed down in your family from 100 years ago? Probably worked well. No, it worked terribly because they hadn't been stored well and were covered in mold (even the ones from only 70 years ago) or otherwise falling apart. I couldn't search them for specific phrases I remembered my grandfather reading me as a child, and I didn't have the physical space of my own to store them all eith…
You seem to be comparing opposite extremes: physical books stored carelessly (in a well-heated and ventilated house, mold shouldn't be a problem) with digital books stored very carefully (you were careful about DRM-free formats, etc.; and if you have stuff from the 80s, you doubtlessly have made backups and transferred it from device to device several times. I have some digital stuff of mine from the 80s and 90s, but…
Oh, and do whatever it takes to keep mold out of your library. Moldy books that you decide to keep, not replace, belong only in sealed plastic boxes treated with borax, sodium carbonate, and/or chlorine dioxide, and preferably stored outside the house!)
Building a library is like planting trees - you don't do it so much for yourself as you do for those who will come after you. I have a digital library, too, but I don't expect it to be usable at all in a century...