[en] This paper recounts twenty years of experience in a multidisciplinary agency in which digital technology, and particularly BIM, has made it possible to decompartmentalize architectural design and deploy new collaborative models in architecture. Firstly, we look back at the initial promises of digital in architectural practice and the obstacles and shortcuts taken over the past decades. Secondly, we recount the emergence of the new multidisciplinary collaborative model developed within the agency. Based on this experience of multidisciplinary collaboration 4.0, we relate two perspectives under development based on digital technology, including the BIM collaborative process: systemic sustainability in architectural design on the one hand and the extension of the project management mission to facility management on the other hand. Through this article, we address the impact of digital technology on the metamorphosis of architectural practice through collaborative multi-disciplinarity.