I tried to make an Xsession file. https://sourceforge.net/p/cdesktopenv/wiki/Createxsession/
It would hang at boot at a blue screen with an hourglass. https://sourceforge.net/p/cdesktopenv/wiki/SupportedPlatforms/CDE may or may not compile on these platforms but will not actually work properly due to, among other things, dthello (the blue splash screen) getting hung up.