You can load your own samples into a new program or old one.
You can edit a new program or tweak an old one.
You can save both kinds of programs.
You have something like 2000 programs, and that is before you download stuff like the free Muzeum - both programs and samples of old synths. And, of course, you can work on them and save them as new patches.
Basically, you get a synth, not a preset player. If you have the urge to tweak to make a patch fit your song better, Rapture is the way to go.
If you are going to upgrade from X1 Pro, you might want to wait since it is likely (considering the past history of Cakewalk's upgrades) that the full Rapture will be included. The bad thing is there is no timeline on a paid upgrade/new X1.
@