>to me, it seems like an almost inescapable conclusion from the widespread use of papyrus, its short lifespan (particularly in anything other than the driest conditions), and the limited supplies available of animal parchment
I agree that papyrus would fare much better in eg. Egypt than in Europe, and Buringh mentions that some of the Greek works translated by Muslims in the 8th century were in fact written on papyrus:
>Muslim scholars and scribes translated Greek and Syriac rolls and manuscripts originally copied on parchment and papyrus into Arabic and transcribed them on sheets of paper that were afterwards bound into books.
He does also mention that some of them were in parchment, however, and from the author I quoted above it seems that important works were copied to parchment already starting from the 4th century. While not about Greek works, I find this quote on the subject relevant:
>Texts perished, not because pagan authors were under attack, but
because no one was interested in reading them, and parchment was
too precious to carry an obsolete text; [...] amongst those palimpsested
we find Plautus and Terence, Cicero and Livy, the Elder and
Younger Pliny, Sallust and Seneca, Vergil and Ovid, Lucan, Juvenal
and Persius, Gellius and Fronto[0]
It also seems from the same book that Greek works were still available in the Byzantine empire:
>In the twelfth century the range of translations was increased
substantially. Much of the credit belongs to Burgundio of Pisa
(1110-93),who had spent the years 1135-8 in Constantinople as an
interpreter and returned there later, taking the opportunity to
collect books. [...] Slightly better known are the inelegant and literal versions of
Plato, Euclid, and Ptolemy made in Sicily c. 1160 under the aegis of
Henricus Aristippus, archdeacon of Catania (d. 1162), who is said to
nave acquired some manuscripts sent as a gift by the Byzantine
emperor to the Norman king of Sicily
I doubt these survived from antiquity as papyrus (although perhaps I am wrong here). These also don't seem to be a re-translation from Arabic either(? would be strange for that not to have been mentioned). They were likely simply copied and maintained throughout the years. This implies to me that papyrus is not the significant factor here. I think the cause was 1. the lack of interest 2. the "cultural divide" (p.79) between what was the Western Rome Empire and the Eastern Roman Empire which limited the study of Greek and the import of Greek books, resulting in 3. almost nobody in Europe could read Greek. Although further investigation is needed.
>but i don't think such works were ever branded as heretical, at least by the organized church;
I think you are right here. I vaguely recalled when I wrote that that certain classical authors were considered heretical, but from a search all I found was the condemnations of some of Aristotle's ideas in the 1200s.[1]
[0] Reynolds & Wilson, Scribes and Scholars: A Guide to the Transmission of Greek and Latin Literature (1991)
[1] https://en.wikipedia.org/wiki/Condemnations_of_1210%E2%80%93...