@rafaelm7o Heh, no. That essay with the click-baity title (https://howardism.org/Technical/Emacs/new-window-manager.html) described an experiment only, as Chris Feng had not started the #exwm project at that time.
https://github.com/emacs-exwm/exwm
(I do like to think my essay might have inspired that project, tho)