I'm keen on escaping the adobe plantation. :unsure:
But I keep getting frustrated with squinting to use the interface. Both tool icons and menu text is too small!
Consider the visual effort expended on an application's interface and add it up over a day's use. That time and energy expended is that much lost on the work that matters. This may be acceptable on an occasional basis but if one's using an application daily for hours at a time, the interface design is critical.
I think this aspect is a major factor in expanding adoption.