I wasn't expecting you to come on the offensive.
It's not called the offensive when you've already done that; it's defending my view.
But how am I contradicting myself?
Because on the one hand you added conditions that weren't part of the original post you made which in your presentation showed that it doesn't work, then later on you say that it's common knowledge, even though these statements of denial is what I usually see when I post about it. At least both you and Rich seem to be capable of doing it, but a great many players don't even think there is such a technique. Let's focus on what can be done and acknowledge when helpful suggestions are made rather than denying their existence.
...even when you pull it off it can sound worse.
Just like every other technique we do requires practice, and when it sounds like crap, it's the user and not the technique to blame. Practice...
You pointing it out the way you do almost comes across as egotistical so it's no surprise you get an adverse response to it...
This is a classical case of projection/justification. You taking it that way says much more about yourself than it does about me, and then your justification line.
In closing, this is an invaluable technique for a problem that I hear every time people start talking about floating trems and should always be a part of any thread where people say that you can't play double-stops in tune when one of the notes is stretched.