Don't get mad at each other people (even as I'm suppressing some anger at some specious reasoning on the part of ... one side or the other of the divide here).
It seems to me even the "it's just a few bad apples (lenses) and noisy complainers" camp might bring themselves to agree that the corporation needs to communicate about the issue, and in any event --
Why the hell does it have to be do or die with the SDM focusing anyway??? The lenses are physically (correct me if I'm wrong) capable of being screw-driven by the body, but current cameras' firmware doesn't support switching from SDM to screw -- wouldn't a simple freakin' firmware patch that would permit users to avoid having to decide among just using manual focus or waiting on repairs (more than once) and going broke in the process or selling the thing (to whom, one wonders) ameliorate the situation considerably?
If SDM were simply a desirable (when it works) fancy feature that one could ignore if necessary while still having an AF lens, then I wouldn't hesitate to buy one. There would be no manufacturing cost at all with a firmware patch, and the company could simply present it as an extra feature -- for all I know, screw-drive might be faster. The user could have a choice between slow but silent, and faster but typically noisy. Thoughts? I have no experience with SDM so people have mercy with my naivete, please