Enterprise apps are also a suitable venue for SPAs. You've got some developers coming from e.g. Swing, MFC++ or even Tcl/Tk, and for those doing every frontend

Enterprise apps are also a suitable venue for SPAs. You've got some developers coming from e.g. Swing, MFC++ or even Tcl/Tk, and for those doing every frontend bit in JS is closer to standard UI toolkits, instead of the constricting request/response cycle of old webapps (except those few that did some hacks with server-side continuations). Also, in those cases a few extra seconds for the initial load or the general size of the application don't matter. It's all better than your average Swing application ("Challenge accepted", said the Electron developer). Although this isn't something contemporary frameworks seem to aim for (ExtJS is dying, and that's good), you get close enough to desktop UI development with Vue/Vuex/Ant Design, Angular/AngularMaterial or React/Material-UI/Redux-boilerplate-reducer-of-the-week.