Scripture is God’s word to us as to what IS necessary for salvation. Do you even know what Sola Scriptura means? It’s God’s way of giving us a benchmark for what is true and to protect us from charlatans, false teachers, and Anti Christs. We are admonished to search the scriptures to “see if these things be true” even if it were Paul and Silas who are the teachers. If not for the scriptures we would fall for “doctrines of men” like the bodily assumption of Mary and falsely placing her between us and Jesus.
And just where do we have the record of the words of Christ?
Which generation of Sola Scriptura are you referring to? SS 1.0 that asserted that all that is necessary for Salvation can be found in Scripture, SS 2.0 that asserts that 100% of the Revealed Word of God is contained in Scripture or SS 3.0 that claims that each individual's own personal interpretation of Scripture is what everyone else must rely on for Salvation?