Functional programming is a powerful paradigm. It does require developers to alter the way they think about programming. Moving from procedural or object-oriented programming requires a bit of a mind ...

For example, only single inheritance is supported; Java-style interfaces are not. ... Search for Lab-VIEW Object-Oriented Programming: The Decisions Behind the Design in the NI Developer Zone.

Back in 2020, Reddit user /u/KrakenOfLakeZurich created a Sudoku solver in Microsoft Excel. It only uses formulae and conditional formatting, and it's available for both Excel and LibreOffice Calc.