I think the last sentence in the quoted matter elucidates one of the key factors in why I think radical feminism *is* outmoded.
Patriarchy is a broad reaching system that entails a social hierarchy which includes *more* than just a man/masc vs. women/fem binary class system.
There are many forms of oppression that take place in a larger medium of sex/gender based oppression and ALL of those help form the larger system of patriarchy.
A more holistic approach is needed than a simple binary.