I care about how a function is called because so much tooling around programming is effectively grep. I can grep for a function name and get a pretty good idea where it is called. There's also a million variants of grep - git grep, unholy regular expressions (recently I used one to find all instances where foo is called with exactly 2, not 3 params, in Python), IDE plugins and so on. GitHub search? Google search for exceptions?
IIRC Nim comes with some kind of "nim-grep" that is camel-vs-snake-aware, but that doesn't fix all the other tools.
The minor gripe, additionally, is that you often have quasi-singleton classes called "FooManager", then a single instance called "foo_manager". Now... are these colliding? Or not, because the first letter _is_ case-sensitive? What does "fooManager" map to then?
In my utility function, this feature gives me nothing but concerns. But then again, I'm not (yet?) a user the Nim community provides for so... <meh>