Do you think that European Paganism would've survived if the Roman Empire had selected Buddhism over Christianity?

A Hellenist friend of mine says that he wishes the Roman Empire had selected Buddhism over Christianity since Buddhism preserves the former Culture while Christianity destroys them. I think so too, because when you look at Eastern Asia you can find Pre-Buddhist deities still being worshiped, while here it was only recently that the former Pagan traditions were restored. Despite this, many things are still lost due to the fact that Christians smashed all things Pagan after they took over Pagan Communities. If I had a time machine, I would kindly suggest Julian "the Apostate" to become Buddhist and make Buddhism the State Religion while also making him wear his armor.