Powerpoint architects are ineffective while expensive to afford. These architects join the project kickoff meetings, draw all sort of diagrams and leave before implementation starts. They are ineffective because of their absence and lack of ongoing feedback during the development cycle.
Ward Cunningham in an anti-pattern called “Architects Don’t Code” addresses the same issue— that “The Architect responsible for designing your system hasn’t written a line of code in two years”. Ward recommends getting architects involved at the implementation level.
In his new book, “Software Architecture for Developers”, Simon Brown advocates a transition from architects as “ivory tower” to a role which is about coding, coaching and collaboration.