I will chime in here.
I just want to say a big big THANK YOU THANK YOU THANK YOU THANK YOU:)....
the vast improvements have definitely helped stabilize Sonar.
I had X1 which crashed and other quirks that affected me to compose music, mixing, etc, but with the new Platinum, It has become very stable now to where I was able to reduce my latency for my firewire audio interface and throw a ton of Soft Sythns except the kitchen sink at Sonar now and it has not crashed once.
I inserted over 20 or so Omnispheres soft synths and FX, etc. and not once did it grind to a halt.
The programmers at Cakewalk are to be commended for writing an awesome piece of software that is also easy to use.
Again thanks.