Dynamic Array Formulas in Microsoft Excel.
Dynamic Arrays are the biggest change to Excel formulas in years. Maybe the biggest change ever. This is because Dynamic Arrays let you easily work with multiple values at the same time in a formula. For many users, it will be the first time they understand and use array formulas.
This is a big upgrade and welcome change. Dynamic Arrays will solve some really hard problems in Excel, and fundamentally change the way worksheets are designed and constructed.