I was just thinking how well the new SONAR updated has been behaving in my long mixing session during the past days. I'm mixing two albums, total 23 projects, some of them over 10 min long with 100-150 tracks and MANY synths & plug-ins. Projects may take up to 4,5 GB RAM.  OK, let's go to the statistics:
 
Minor issues: yes, here and there but...
Total amount of crashes: 0.
 
Zero crashes! Bakers, you have done excellent job with the audio engine and program core!
AWESOME!

Agreed!
 

Yeah I think stability with Sonar is at an all time high. Cakewalk should be congratulated. There are some serious problems elsewhere but I would not want to take away from that comment.

Good to see you Panu. I know what you mean about Sonar 2015 being stable. X3 was very stable before but now it seems bullet proof. Add to that all the improvements plus the new features no wonder its gotten a lot of praise. 

hmmm? Why do I get so many audio drop outs?
 
 

Got to agree with the OP.
 
A couple of recording and mix sessions over the weekend (using a wide range of virtual synths and signal processing), without the slightest glitch.
 
Respect to all involved :-)

dappa1
hmmm? Why do I get so many audio drop outs?

My RME UFX with USB cable & buffer 256 in ASIO is more rock solid than ever with SONAR 2015.  In my experience the updated audio engine has got a lot of performance improvements over X3.  I'd suggest you to check different driver modes etc. to find "the golden settings" for your setup...:)

Doktor Avalanche
There are some serious problems elsewhere but I would not want to take away from that comment.

Agreed. For example, the new start screen is totally non-working for me (lack of support for UTF characters) but currently the main problems are hiding in auxiliary features, not in the very main core of the program. 

Just installed Sonar Platinum (Hopkinton update) two weeks ago. Works very good for the most part, but whenever I'm editing in the Piano Roll view, it randomly freezes and stops responding (the usual faded gray screen). If I wait for Sonar to respond, the display eventually comes back ok but one click and it freezes again. No choice but to close the program. This started happening on the very first project in which I'm using midi, and I only have AD2 open, no other VST plugins or effects. This happens only when editing in the Piano Roll and only glitch I have with Sonar. 
 
Anyone else having these issues?
 
 
Sonar Platinum /Windows 10 Pro (x64) /Gigabyte H97-D3H-CF /Intel Core i7-4770 3.40GHz /16 Gb RAM /Scarlett 2i4 2.5.1 Drivers

For what it's worth, I'm in a pretty happy place with Hopkinton as well. I just fired it up and started (from the start screen) a rather complex project, including a bunch of audio tracks, FX, seven soft synths including instances of Alchemy, Reaktor and Rapture Pro, and some bus processing, and was ready to go in 24 seconds. It plays without issue, though I have to bump up the latency somewhat to run everything. This on a decidedly long-in-the-tooth desktop (Q6600 based) built in 2008 or so, running 8.1... I don't seem to be experiencing the startup issues others are talking about, as it doesn't seem any slower than on previous releases. I hope whatever is causing that for some gets ironed out soon, but it doesn't seem to be happening here - and I'm connected to the internet full time (though it shames me to admit it!).