I have been using Cinema4D untill I had to stop for various reasons at R10.1. Now, once again, I am interested and trying out the demo of R15. Things look familiar, but have also changed. And my Cinema braincells are a bit rusty and stiff after some seven years. So I consider myself a kind of old-newbie.
Due to my budget I will have to start with Prime. Without wanting to say anything negative about Maxon's choices: I did have several modules, which I liked. What I will miss most are three Advanced Render options: SubSurface Scattering, Sub Polygon Displacement and, to a lesser degree Caustics. Paying some 1000Euro more just to get Visualize and have these (and I know: a physical render engine) is for the moment beyond my means.
Yet: I do have the Translucent Pro and Vreel Skin plugins.
I can't test them out in the demo, but would they still work in R15?
I know: this is like asking for a bottle of flogiston at a nuclear plant, but you never know...