The labeled forms give my brain a chunk of code, with a name, to compartmentalize / internalize. In the nested forms, I have to either chunk it on the fly (eve

The labeled forms give my brain a chunk of code, with a name, to compartmentalize / internalize. In the nested forms, I have to either chunk it on the fly (every time I need to read it) or not chunk it and make my eyes do a bunch of work. Code that comes later in a single code base will usually copy the patterns that are already established in that code base. (Assuming the starting patterns are decent, this is as it should be.) If you add one more level of fun nesting or something like that, the labeled examples become even clearer. Since it's entirely likely that new code will copy the existing pattern, I prefer code shapes that will grow cleanly.