Comment by skrebbel

The second point here made me realize that it'd be super useful for a grep tool to have a "super case insensitive" mode which expands a search for, say, "FooBar|first_name" to something like /foo[-_]?bar|first[-_]?name/i, so that any camel/snake/pascal/kebab/etc case will match. In fact, I struggle to come up with situations where that wouldn't be a great default.