Let’s be real here: was anything of value really lost? Any important work was likely cited, paraphrased, or duplicated elsewhere. Anyone disagree?
1. The importance of a piece of scholarly work need not be immediately apparent to its contemporaries.
2. Being cited is a poor proxy for importance.
3. Work that is cited is rarely paraphrased or duplicated in a meaningful way.
4. Paraphrased citations are a poor proxy for canonical source; papers are often cited incompletely or sometimes outright inaccurately.
5. These are the fruits of people's labour. They spent days and months producing them. To lose them, especially when digital copies are so cheap, is an unnecessary disregard for said labour.