Why did Hebrew scrolls apparently fizzle out with Chronicles roughly 5 centuries before Jesus. Did they run out of God material? They had been on a roll up to that point and even though Chronicles left them expecting a King, they missed the boat on that one so things were still left open until today. You'd think after another 2500 years they would have added a scroll or two if the NT means nothing to them. Did they go silent back then or are there scrolls since that we don't hear about?
The simple answer is that Hebrew ceased to be the vernacular language of the Jewish people, being superseded first by Aramaic, to such a large extent that the Paleo Hebrew alphabet was actually replaced by the Imperial Aramaic “square letter” alphabet among the Jews (which remains in use to this day, although the 800 or so surviving Samaritans continue using an alphabet which is a direct descendant of Paleo-Hebrew), and then subsequently by Greek.
For this reason, the more recent Old Testament books mainly survive in Greek recensions, although the Dead Sea Scrolls point to the existence of Hebrew and Aramaic versions of some of them.
However it is certainly not the case, as some people frustratingly argue, including but certainly not limited to, the editors of Thomas Nelson’s curious* premillennial dispensationalist King James Study Bible, that the Old Testament simply stopped 500 years before the Nativity of our Lord. Indeed, the newest and most recent Old Testament book is the Wisdom of Solomon, which is an extremely beautiful and prophetic book (see chapter 2, which is pure Christological prophecy), which was compiled just sixty years before the birth of our Lord, which I regard as a Holy Miracle.
*I consider it curious because someone without prior knowledge of the current state of Christian denominations and KJV usage one would assume a KJV Study Bible would reflect Anglican doctrine, and would contain all of the books originally present in the KJV (the deuterocanonical books referred to in the KJV as the Apocrypha, such as Ecclesiasticus, Wisdom, Baruch, Tobit, etc.) since the KJV was originally translated and compiled to serve as the liturgical bible for use in the Church of England, and was later adopted in the (Presbyterian) Church of Scotland in the 1660s-1670s as a replacement for the Geneva Bible.