The main reason why I have not already converted from Win/OSX is that Adobe doesn’t have native support for Linux. I just found a Facebook Page that asks for your LIKE to try to collect as many votes as possible in an attempt to get Adobe to understand that Linux users want there product.
I IS possible to use Adobe product like Photoshop with a bridge program called Wine but not without hassle and ore some functions that doesn’t work or just doesn’t work as good as in Win/OSX.
The reason why Adobe doesn’t care about Linux users is that they only represent about 1.7% of the computer users worldwide, in my point of view, that would change if software producers like Adobe would make there products available for the Linux platform.