From fame to oblivion- famous Armenian writers during their lifetime, but forgotten now

There is a well-known story about how someone with the surname Tumanyan kindly urged the very young Hovhannes Tumanyan to change his surname and choose a normal literary name, because there cannot be two Tumanyans in the literary field. However, no one remembers that person anymore, but everyone knows Tumanyan.  Why are writers being forgotten, is this forgetting solely related to literary value, or are there other reasons?

Literary critics Hayk Hambardzumyan and Arkmenik Nikoghosyan discuss.