Just my tuppence-worth:-
I can only speak from my own experience of using Sonar and this forum.
Sonar (and possibly other DAWS and software) does seem to behave differently on different systems, and with different settings. I had problems when I upgraded to X1, but they were mainly user error, or buffer settings related, etc. The other issues had completely gone by X1d. It was extremely stable.
I had quite a few crashes with X2, which all disappeared with the quickfix. I now find it very stable once more.
I realise that this is on MY system. On someone else's it may be hell, I don't know. Just because someone may state that all is well and they like Sonar, when other people's experience is disastrous, doesn't mean that they are necessarily making it up or being a "fanboy", or whatever. That may just be their experience of the product.
When someone posts on her saying "All is well, I love Sonar" I think "Oh, good, they're getting the same results as me."
When someone states that all is not well, I will try to offer any help, or point them to someone more knowledgeable, in case it is a system specific problem, or, like me, user error.
When someone just slags Sonar off, without appearing to listen to any advice, then I might argue the point.
I think my long-winded point is:
Just because you're having a bad time, doesn't mean that anyone who is okay is Ahole, or a "fanboy". It is just working well for them.