It is a matter scope. use features is lexically scoped, and james2vegas demonstrated each statement has its own scope.

Your statement is false, and your code does not support your statement.

Since nobody has yet shown a case proving that any of these ever get run, nobody has yet demonstrated that the lack of affect is due to separate scoping instead of just being due to lack of execution. I see no examples yet that support your conclusion. LanX has given at least two examples that clearly demonstrate a lack of execution.