Please See #95. But the short answer to your question is that I think the Bible is materially sufficient, but not formally. To use an analogy if faith were a house then the Bible would provide all the materials to build that house. But it’s not a house. Sacred Tradition, in keeping with Sacred Scripture is what builds the house.
So it does then beg the question: Did God give us the materials and say, “figure it out for yourself?”
men’s traditions should never trump or be considered equal to scripture.
the pharisees got wrapped up in traditions to the point they missed Christ altogther, and decided to pay someone to murder him. their traditions took them far away from God, all the while they believed they were right to crucify Jesus and persecute Christians.
SS does not require Scripture to be wholly formally sufficient, as if all was clear and as if nothing else was required to understand it, except the text. And in fact it provides for what is required,as well as formally providing clear teaching so that one normally can be saved by reading perhaps Acts 10:36-43.
This was addressed earlier today. See here . Sorry you missed it.