[kalleboo]

From the thread it looks like there are over 6 languages that use .m as the filename extension (including both MATLAB and Mathematica which you may have heard of), meaning the whole concept of a unique "primary_extension" is kind of ludicrous.

[fastball]

I thought that Mathematica uses .nb extension?

[cowsandmilk]

Mathematica notebooks use .nb ; but Mathematica scripts generally use .m [1]

[1] https://reference.wolfram.com/mathematica/tutorial/Mathemati...