After around 2 years of using another DAW but keeping my Sonar version up to date (I have a lot of old projects in Sonar), I thought I'd listen to a couple old projects just to see if everything was still working. I recently updated my hardware and OS and I wanted to see if things still worked.
New spec: i7-6900, 64Gb, MSI X99 Carbon Pro Gaming, Antelope Orion 32 HD, Win 10 Pro, fresh install of everything, new box.
Win 10 Tweaks: Killed all the apps and services associated with them, except Microsoft Store. After doing that, I ended up with a Black Viper level clean system, Win 10 OEM is pretty clean once you kill all the Apps.
Revisiting Sonar after a couple years, it seems to work pretty well. The dropouts I was experiencing with my UAD Apollo Firewire Quad disappeared with the new interface and most projects seem to run with almost 0 CPU load.
The UI seems to have changed significantly, it looks a lot better. Unfortunately, it still feels a bit clunky, still no Ctrl-D.
Honestly, I haven't used Sonar for much in a while, but it seems to be a lot better now.
The two things that would make it even more better would be a control room and Ctrl-D duplicate.
I'm curious, is there a core limit setting? See: https://helpcenter.steinberg.de/hc/en-us/articles/115000535804-Windows-10-audio-dropouts-on-multi-core-CPU-setups
 

TomHelvey
Honestly, I haven't used Sonar for much in a while, but it seems to be a lot better now.
 

I used it a lot and I still agree very much :-)

Sonar works well with multiple cores. I think it was Noel himself or others in the know that explained special effort and close co-operation with Microsoft and Intel (evidence Noel's posting, subject Tech Talk) ensures Sonar is ahead on that level. No core limiting, no need. Certainly no dropouts because of that.
 
And the recent push to clear bugs in Sonar has solved annoyances that peeved me off since Sonar 8 and even earlier now sees me an extremely happy Sonar user.

TomHelvey
The two things that would make it even more better would be a control room and Ctrl-D duplicate.

 
What specific control room features do you want to see? I have bus setups to handle monitors, headphone mixes, etc. as part of my normal project.
 
I know what you mean by ctrl+D but I just paste special when needed. There's an extra step, but it's not functionality that I need very much.