Meh ... I found CDE (and its "enterprise" successor VUE) to be really clunky.
mwm, for its time, was a nice window manager. Largely similar in capabilities to fvwm2 today, though mwm had the ability to separately specify window border color properties that, to the best of my knowledge, fvwm couldn't. Something I used at the time to subtly indicate active vs. inactive windows.
Really, none of which matters to me in the least.
Today's news is an interesting footnote, and may assist a few projects, but other than proving the point of the value and obviousness of Free Software licensing over propriety alternatives, won't have much impact. My prediction.