In my eyes, the "size of the delta" between, say, fish and bash, is similar to that between, say, Perl and PHP. Or C# and Java. So I feel it's justified to sa

In my eyes, the "size of the delta" between, say, fish and bash, is similar to that between, say, Perl and PHP. Or C# and Java. So I feel it's justified to say that fish is a different language than POSIX shell.