This seems far-fetched to me and doesn't have much to do with readability anymore. Moreover most of the time this is imo how code should be. If you start programming with readability in mind and as such start throwing away standard design practices because they lead to one more click or less readability, you are doing it wrong. That comes dangerously close to using copy-paste instead of a function because it is clearer since you can see the implementation directly. I'd argue that you should not have to figure out what the implementation is. That's the whole point of using interfaces (and dependency injection for that matter) - if you have to figure out what implementation used then you are either the implementer or the code is wrong somehow, like it is violating substitution/dependency inversion principles. Or you are studying the code in-depth, in which case you have to go through all implementations anyway. Calling all that 'readability problems' is a bridge too far.