When should archaeologists excavate a buried library?

Should archaeologists excavate the library reportedly buried by Vesuvius now, or wait for better technology?

Compare deterioration in place with the capability of current recovery methods: wait if excavation would destroy the material, but proceed if it is decaying and can be recovered safely.

Excavation requires balancing two kinds of loss. Material left buried may continue to deteriorate, while material exposed with inadequate methods may be destroyed during recovery. If current technology cannot retrieve anything safely, waiting preserves the possibility of a better future method. If the site is decaying and available techniques offer a credible recovery path, excavation is worth attempting.