I could do half-screen nested array formulas when Excel was before the ribbon (and screen resolutions were smaller), out of necessity and because I could. It was in quite demanding uni home calculations and then mostly when working as intern in IB. But then having a life is also important...

The only thing I still enjoy is that any data smaller than 1M rows is sliced and diced almost without thinking. I am sometimes really grateful that MS did not break the shortcuts, while almost breaking the product overall. The muscle memory works perfectly.