Thanks for the precision. But is it really style insensitivity? That’s what I thought until I understood that it is only a consequence of ignoring the underscores in identifiers as underscores are ignored in numbers.
So Nim style insensitivity may be seen only a consequence of Nim case insensitivity and of its special usage of underscores to improve readability in numbers and identifiers. Still, one can dislike it, but it’s not so arbitrary that it might seem.