Most software is written for internal use and not sold to external customers. For this case Changelogs are busy work without much utility up until the point you

Most software is written for internal use and not sold to external customers. For this case Changelogs are busy work without much utility up until the point your organization is big enough that you and your "customer" may as well be separate companies. In that case you're better off writing a blog post or release announcement than a text file change log which is for grey beards, not users.