Sorry, brother, you are contradicting your own Sola Scriptura doctrine. NOWHERE does the Bible tell us that oral traditions are abrogated or discarded once Scripture is written. Paul writes to the Thessalonians - WRITES to them - to HOLD ON TO THE TRADITIONS, BOTH ORAL AND WRITTEN. This doesn't sound like oral traditions have been done away with by the Bible - only by Protestants.
The fact of the matter remains that Apostolic Traditions that were not written in what we now call the Bible were NEVER done away with - that is a Protestant tradition of men, as defined by Christ, because it keeps people away from part of the Word of God, just as Korban did for the Jews.
It would be foolish to trust the veracity of oral teachings passed down from generation to generation by fallible men when the inerrant WORD of GOD is available.
Apostolic Tradition doesn't mean it is oral teachings to this day. It means that they were not explicitly recorded in Scriptures. They were written down, just not in the letters that have been collected into what we now call Scriptures. Also, we rely on the Spirit to ensure that they remain passed down completely and accurately to the degree that the Spirit desires.
It would be equally foolish to trust historical documents that are not the inerrant WORD of GOD as equal to the WORD of GOD.
The Word of God is not only written! Read the Acts of the Apostles. They refer to the "Word of God" and do not refer back to Sacred Scripture, but to the proclamation of the Gospel. IF the Gospel is from God, then who cares what form it comes to us in? God will protect it IF it is from HIM!
Regards