I'm not aware of any OS upgrades. Only one stereo pair of outputs though. Electric pianos are passable, brass sections kind of boring. Some wind instruments are great, others are lame. It's possible to wring fantastic subterranean ambient noises and all kinds of weird clangy things from this synth.
Drums are overall really good.
The FX are tremendous, clean and airy. A very capable synth that sounds wonderful. 9 Hasn't broken yet. Would gig with it if I could get a gig. You decide whether this is reasonable.