The cultural analyst can pick or mix from the catalogue of theories to put together synthetic models for whatever the task may happen to be.
Except for the most committed enthusiasts of particular movements, most critics tend to operate in magpie fashion these days, selecting a bit of this theory and a bit of that for their own personalized approach.
The sheer profusion of theories with which we are confronted promotes this kind of experiment.
In the theory world at present, it is very much a consumer's market.