The only thing I really want out of a System 8 successor is multitimbral operation. If I could get four parts of System 8 I would absolutely use this synth way more than I do (and I'd gladly shell out for it!). I usually gravitate to the Virus or Nord Lead for that reason. It doesn't really fit my workflow to record a part so I can reuse the synth.
The Roland Cloud plugins are great but they're a bit heavy on my system. and I find I can only get a couple parts going on the computer before I have to dial up the latency enough to screw up the composition process