@egypturnash On seeing this, there's the part of me that's tempted to ditch the CS6 I presently own and acquire CC, thinking that they've got to have worked out all the kinks by now, right? And it could be worth the effort just for the HiDPI support, since both of my computer displays are 4K now.
The other part of me, however, is perfectly aware of Adobe's track record as such things go. Are those installs left behind by updates, or did you keep them intentionally, and why?
@ElectricKeet I kept them intentionally because every now and then Adobe will introduce a "helpful new feature" that completely breaks my favorite tools. CC2017/21.0.0 is my daily driver.; I've just never gotten around to cleaning up.
High-DPI sure is nice, the Mobile Studio has other issues that have me mostly back on the Air, but it's damn nice to turn off anti-aliased previews and never see it glitch the AA on a clipping mask ever again.