The feature isn't just about spaces. It's also how you'd work around interacting with JVM code that uses what would be Kotlin keywords. For instance, Java classes with a method named "is" or "val" can be called through
val isBar = foo.`is`(bar)
rather than needing to use reflection like you would to accomplish the same in Java.
The Kotlin style guide basically says "never use this outside of test names" and some targets, such as old Android, don't even support the feature in test cases.
The Kotlin style guide basically says "never use this outside of test names" and some targets, such as old Android, don't even support the feature in test cases.