Yes, but when the time comes to buy a camera and you've never had the function, one wants to weigh the pros and cons of having that feature to see if it's worth paying extra for. That was actually the whole reason for starting this thread (for me at least). I'm extremely happy with my 30D. But I dont have a few things that have become standard on newer cameras: dust shaker and live view. I know I want the dust remover and I'm willing to pay extra for it because I change lenses a lot in the field. But live view? I dunno. Never used it and I'm curios as to the opinion of photographers to it. Not engineers, not salesmen, not manufacturers. Photographers who use it and decide whether it's worth the extra money.
As for something having to have cons, yes. Everything has cons and pitfalls. Everything. I'm interested in what those are for Live View, that's all.
I must add (edit) that you fike already posted a caveat of live view. Thanks!
Re-reading this, I think I should drink some coffee and calm down =)