montunoman, well, that's why a lot of musicians don't really enjoy any update or upgrade, any small change leads to lots more of changes. But I think the software you need won't demand a lot of your computer, and unlike it was with PSR-S950 now you are able to have several expansion packs at once.

Addition: also there’s an option within a keyboard to restore all pre-installed packs, supposedly it should make the things as they were when you bought it.