What these three applications have in common is that they all have the CC Library (called Library in Illustrator and Photoshop).
Try this technique to fix a problem which causes a slowdown for some people:
I just tried it but unfortunately it doesn't work either.
it is slow within the application (selecting on tool then another, scrolling pages, moving text/image boxes, typing) as well as in the dialog box (when selecting a document to open).
I've tried to deselect the thumbnail in the panel options, desactivate fonts. It seems like if the "cache" is full.
What else can I do?