Turns out half my old formulas were just dynamic arrays in disguise, written the long way.

Array constants in Microsoft Excel are powerful tools for performing multiple calculations with a single formula. Using array constants in your Excel worksheets avoids the need for lengthy or repeated ...

Reference: The cell or range of cells or range of cells for which you want to return the column number. It is optional. You will notice that the cell will return the cell number of the cell that ...