If a truly large archive were found then who’s to say that it could survive long enough to be properly studied? There are multiple sources of untouched ancient texts today which aren’t much studied. Off the top of my head, I’ve heard there are chests full of (roughly 1000-year-old) Arabic manuscripts littering the Archbishop’s palace in Toledo, largely untouched due to a lack of interest/number of scholars (and perhaps it is hard to get access). There are also many manuscripts spread out across private basements in Timbuktu, those have survived several threats but who’s to say they will survive more? On the other hand we have hundreds of thousands of cuneiform tablets, most of which are unread (they had the advantage that when a library burns down the tablets are often fired instead of destroyed). It is hard to decide what is worth prioritising before it has been read.
The one solace we can take is that modern techniques may let us read manuscripts after they have been largely destroyed.
The one solace we can take is that modern techniques may let us read manuscripts after they have been largely destroyed.