For all this, it could have a lot of the same issues as GTK+ for all I know (it doesn't really have an independent existence as a project outside of Enlightenment, just as GTK+ doesn't these days outside GNOME), etc. I hadn't been aware of it, and perhaps other people weren't, either. It doesn't show up in the usual lists-of-widget-toolkits, but I think worth being aware of.
Oh, and to add something possibly constructive: I know little about https:/ /docs.enlighten ment.org/ stable/ elementary/ - but it's another option. It doesn't seem to be that well-documented on Stackexchange, etc. It does have the general widgets and containers one expects: https:/ /docs.enlighten ment.org/ stable/ elementary/ widgetslist. html and https:/ /docs.enlighten ment.org/ stable/ elementary/ containerslist. html
It also supports Wayland, at least; see https:/ /phab.enlighten ment.org/ w/wayland/ and https:/ /fosdem. org/2014/ schedule/ event/enlighten ment_standalone _wayland_ compositor/ attachments/ slides/ 462/export/ events/ attachments/ enlightenment_ standalone_ wayland_ compositor/ slides/ 462/Enlightenme nt_Wayland_ Compositor. pdf for details, and in general, seems quite actively maintained.
For all this, it could have a lot of the same issues as GTK+ for all I know (it doesn't really have an independent existence as a project outside of Enlightenment, just as GTK+ doesn't these days outside GNOME), etc. I hadn't been aware of it, and perhaps other people weren't, either. It doesn't show up in the usual lists-of- widget- toolkits, but I think worth being aware of.