You’ll get it from folks like Richard Wolff (on the more academic end) and Amber Lee-Frost / November Caldwell Kelly (on the podcasty end). Piketty’s “Capitalism in the 21st Century” also takes a deep dive into Managerial Capitalism and the modern method of corporate administration.
More orthodox Marxists tend to dismiss it as a distraction, but I tend to think there’s real value in understanding the class elements of the administrative state as distinct from both proletariat labor and bourgeoisie owners.