I'm hoping that future iterations of S1 will be much more efficient with third party plugins than the current S1 5 version. Compared to other DAWS, it seems like the processor works too hard to handle third party plugins when tested against other DAWS on the same computer with the same sample rate and bit rate.
Don't get me wrong, I've converted to S1 from Digital Performer / Pro tools and am NOT going back. Love the work flow. Just a suggestion that I hope is read and acted upon by Presonus.