>CDE is still developed and modern in 2021

I read the article and while I see a pretty good installation guide, I'm left unconvinced that CDE is either currently being developed or that it is "modern".

Anyone else?

Yeah 'modern' implies a lot of things. Anti-aliasing fonts? Nope. Hi-DPI? Desktop notifications? Configurability? Dragging items into menus instead of messing with config files?

But I like that people still maintain it. If I actually wanted to use it I would use NsCDE: https://github.com/NsCDE/NsCDE It's a CDE skin for a modern FVWM version which does have a lot of mod cons.