Apparently, the research literature calls this feature Sheet-Defined Functions (SDF). Doesn't it use this result from Microsoft Research UK that was just recent

Apparently, the research literature calls this feature Sheet-Defined Functions (SDF). Doesn't it use this result from Microsoft Research UK that was just recently published in ICFP 2020: Elastic Sheet-Defined Functions: Generalising Spreadsheet Functions to Variable-Size Input Arrays https://icfp20.sigplan.org/details/icfp-2020-papers/46/Elastic-Sheet-Defined-Functions-Generalising-Spreadsheet-Functions-to-Variable-Size- https://icfp20.sigplan.org/details/icfp-2020-papers/46/Elast... Fastest beeline from research lab to the end-user I've ever seen.