I use a dedicated PC for studio applications only. No internet connection. No other work done on it. In the update madness these days it's hard to keep surprises out of your business anyway (so this DAW is usually at least an update behind and has monthly disk images and images done before major updates).
Then I got an almost as strong backup system which I could hook up within minutes. It's also the system where I apply Sonar updates first to see if it makes a difference to apply it to the main system (of course disk images also available here).
Live playback and show control is yet another machine (plus a backup) as it requires other apps working alongside Sonar.