Revolving doors haven't so much gone out of fashion as not being needed as much - you certainly can still find them.

The revolving door primarily exists to control air flow - particularly in tall buildings. (they can also be used to control the flow of people for security - one-way revolves that use bars to block the opposite flow) For situations involving a low flow of people they work fine, but they are inefficient for larger flows.

Compounding this are safety issues - the deaths at the Coconut Grove nightclub fire in the 40s were due in part to a single revolving door. Ensuing legislation to make emergency exiting more available (side doors or collapsible rotators) just make the use of revolving doors are the more problematic.

I would suspect that advances in HVAC - as well as the development of "air curtains" - have reduced the temperature-control aspect of the revolving door