Comment by antononcube

Yes, Wolfram Language (WL) -- aka Mathematica -- introduced `Tabular` in 2025. It is a new data structure with a constellation of related functions (like `ToTabular`, `PivotToColumns`, etc.) Using it is 10÷100 times faster than using WL's older `Dataset` structure. (In my experience. With both didactic and real life data of 1_000÷100_000 rows and 10÷100 columns.)