It makes more sense....
When you realise what business Sun is really in.
Sun don't really care THAT much what software you run, provided you buy their hardware to run it on; conversely, if you are happy to buy their hardware, the cost of writing and maintaining operating systems so that you will (or can) use it is an overhead, not a profit center.
Solaris is a damned good unix (linux may well catch up someday, but for now....) but like most unixen, the bulk of non-kernel open source sofware will or can be made to run on it - so unlike MS (where Office drives adoption of the OS, and must be defended at all costs) anything that increases sales of the hardware (even at the expense of Solaris takeup) is a Good Thing.
Adobe are not in that happy situation; their ownership of the postscript, pdf and font "standards" are their primary IP, but their main income-generating products are software products (they had a near-monopoly on the mac market for high-end design software, but as mac users and macs themselves move to the Wintel platform, that market lead has been lost).
To give away what few advantages they have left (mostly the code in such products as photoshop, which is still considered the best image package out there by most designers) so it can be bodily lifted and placed in other open source products, and/or just used "as is" for free, would destroy them. Adobe is not Sun, and what would be good business for Sun would doom Adobe.
Biting the hand that feeds IT
