Array Formulas have been around since the beginning of Excel. The author wrote a whole book about them back in 2012. Array Formulas were powerful, but complicated. Then Microsoft invented the new Worksheet Calculation Engine in Microsoft 365 Excel and just like that, 40 years of Excel worksheet formula methods changed overnight. Dynamic Spilled Array Formulas, born inside this new calc engine, can now spill results from a single cell and dynamically...