This issue of "ZDM" collects research works sharing a common reference to the theoretical framework of Mathematical Working Spaces (MWS), a construction which emerged about one decade ago, and has progressively found its way in the mathematics education community, thanks to the collaborative work of an international group of researchers. In this reaction paper, I approach this new theoretical construction, using the concept of research praxeology which has been introduced to support practices of networking between theoretical approaches. After a short introduction, in the first section of this reaction paper, I introduce this concept and explain how it shapes my reading of the different contributions, before expressing the vision of the MWS framework and of its educational potential it leads to. In the final section, I point out some questions and challenges regarding the MWS theoretical framework emerging from the use of this specific lens.