I guess Cinema4D is good for now. Why?
- Modo is great for modelling and good for creepy guys like Houdini & Naiad fans. Although it's a compelling project, but not much popular.
- Modo has it's own internal "corona", and I heard it's good. Why need another one? :)
- Softimage is for vfx pro's & geeks. It's like more for prMan, Arnold, etc... but not for Corona.
- Cinema left :-) It's popular. Cheap. Simple. Etc, etc, etc. And it also has everything ported to it - vrays, shmirays, etc. So Corona should be ported to it too.
I don't have anything against Modo, even like it more than Cinema (although I didn't touch it yet, as Cinema either). But let Modo be second. And Cinema first.
That's my humble little emotional opinion.