How do the Sola Scrptura folks react to the Dead Sea Scrolls and other more recent discoveries of ancient Biblical texts not among those canonized by Martin Luther?

Nuda Scriptira is scripture alone. Sola Scriptura is writings authority over traditions and does not imply Biblical inerrancy (see above in regards to Jesus, and genealogy to David).

If you study, you will find passages in the Orthodox Bible, not in the Catholic.

However, if one is using the Bible as a premise and traditions, how does one evaluate discrepancies between the two, as traditions are interpretations of Bible passages as their claim for validation.

How can we worship Shri Krishna at home? Is it enough to install an idol, or are there other rituals that are mandatory?

Actually, Luther was influenced by the books of the Masoretic Tanakh and did, originally, include the Apocrypha.

The New Testament was established as part of creating a universal (catholic) interpretation for all Christians.

In response to A2A:

Why do women need to wear bras, in spite of the fact that the breasts are an integral part of the body?

Since the Bible is a collection of writings (literally what biblia means), you will even find that while Matthew and Luke have genealogies, Paul wrote to Titus and Timothy not to pursue foolish genealogies.

Even Jesus questioned how the Messiah was David's son.

The influence of the Christian Old Testament was the Septuagint, which predates Jesus. Luther, also maintained the Septuagint philosophy of law, history, poetry and prophets, in ordering, while the Tanakh followed Torah, prophets (Nevi'im) and writings (Ketuvim).

Which bands became massively popular for covering songs rather than recording originals?

Just as there are a few discrepancies between the Masoretic and Samaritan Torahs.