Consider the following sentences.
A'1: Using cosmetics is not limited to women but also has been started by men.
A'2: Not only women but also men have started using cosmetics.
Who started first is ambiguous.
B'1: The end users of convenient stores are not only from young people but also many from old people.
B'2: The end users of convenient stores are many not only from young people but also from old people.
Which group has more users is also ambiguous.
Do X and Y have the same state when using ~X にかぎらず Y?