I had almost convinced myself to be content with the minimum crossgrade whenever it was released. Now that it has been, the price difference between the minimum crossgrade and L5 Platinum (I currently have L4 Platinum) is some $350. There's a lot in the L5 Platinum that doesn't interest me, but the following do:
Lange's Commentary on the Holy Scriptures
Practical Works of the Rev. Richard Baxter
Theological Lexicon of the New Testament
Theological Lexicon of the Old Testament
Works of Jonathan Edwards
An Exposition of Prayer in the Bible
I can live without these, and I may decide to do so, but these and a few other one-volume gems make the Platinum upgrade more attractive before I knew the price for the minimum crossgrade.
And Diamond even more so, but that's not even a consideration.