I am a working photographer as well, doing national advertising - all on location. I use a couple of 1Ds series cameras and a small group of Canon lenses. Don't see any reason to own anything more. I just don't loose sleep at night over what my equipment supplier is/is not doing. As a photographer who makes one's living shooting commercial work I just expect that nothing is perfect, from my camera to the weather and everything in between.
I was always under the impression that if you feel you are being ripped off by someone you just go find someone new to do business with, even if it costs you more. Life is just too short.
You're right, nothing is perfect, but my 1VHS - which I use on a regular basis - comes close.
In the many years I've owned that camera, I've always been satisfied and that's what's important to me. It met my expectations and always delivers. Digital is not a mature market though, and that makes a rational film to digital comparison difficult.
Anyway, the gear head in me and the "what's possible vs. what we get" questions in an immature market cause dissonance. As I said before, I prefer Canon, but the stingy upgrade cycle is what's wearing me out. I'd like to get off the wheel. Instead of offering the best they can, Canon deliberately withholds features so they can offer something "new" in another year. They charge a "premium" [their word, not mine] simply because they've had no real competition. While customers are numbers on a spreadsheet (like many companies) but withholding features such as a decent LCD and respectable UDMA support on a 1Ds3 is untenable to me.
I understand marketing, but there's a line where a company becomes Intel-like (the worst market churning company I've ever seen) and Canon has crossed that line. That's my opinion, if yours differs, that's fine but it's just another opinion. If you're satisfied with what you have, that's fine too. I am not satisfied with the current line up, and believe Canon's behavior is wearing quite thin on lots of people.
Regarding the suggestion to "switch", I applaud Nikon for finally offering competitive products, but they do not offer what I want yet either. I'm not about to move to a company that can't deliver more than 12MP...