DPI independence definitely existed in some forms. (Heck, even GDI theoretically had DPI independence baked in, since I guess everyone was inspired by PostScript et al.) And I never really disputed layout management, since I was aware that some systems were doing that, too. I dispute that most systems from that time period could do what we do today and scale correctly on high resolution displays. I’ve had enough experience setting Xresources to be skeptical. But frankly, I just don’t have enough experience with Motif and CDE to really stake a claim here. So I’ll fold on that one: DPI scaling is certainly not absent.

I was most curious to hear about screen readers, because I wasn’t aware of any accessibility protocols or buses on UNIX-likes prior to ATK. But I’m guessing CDE desktops really don’t have that. Maybe the easiest way to find out would be to just boot up CDE and find out, since I’m pretty sure it’s still maintained…