That is just so wrong.
Thats quite POV dependent, isn't it? Going by the feature list you're right; but as a photographer: getting more use/value from SBs then from their Canon counterparts when using Canon cameras leaves a funny taste...
No, saying Canon hung 580EX II owners out to dry is not a fact, every feature of the 580EX II is fully supported by the 600EX-RT, I really don't see how anybody could class that as hung out to dry.
Whereas you believing you get more value out of an SBwhatever with SU4 than a 550EX for around a $100 that has 95% of the functionality of the 580EX II is a personal POV dependent comment that would need to be evaluated on a per user level.
Canon are not innocents in this though, I well remember when they changed lens mount from FD to EF, then we were hung out to dry, but it all worked out for the best, sometimes harsh love works and I am sure Canon spent a lot of time discussing that major decision. There is no doubt in my mind, now with the benefit of hindsight, that Canon did the right thing then. I get the feeling they have done the same thing with the inability to use the optical and radio at the same time with the new RT system.
I suppose we have to agree to disagree. My point is simply this. Canon chose to release half of a product. They released a transmitter and no receiver. There is absolutely no technical reason why they needed to do that. Indeed, Yongnuo, Pocket Wizard, etc. etc., all produce transmitters and
receivers or transceivers that combine both functions.
Canon, on the other hand, chose not to release a receiver, only a transmitter.
This is not, in any way, comparable to complaining because Canon products are too expensive or that they failed to custom build a camera to one's specific desires. This was a calculated judgment call on their part not to offer a complete product to make their previous top-of-the-line product compatible with a new model.
Yes, I understand that the new strobe can be used with IR control. I understand that the same features of the 580EXII exist that existed before they released the 600.
Actually, referencing the change from the FD lens mount is a good comparison to make my point. Canon has acknowledged that they only changed the lens mount because they simply could not continue to use the same mount and keep current with technology. They did it reluctantly.
In this case, there is no technological reason they can not produce a receiver that would work with older model strobes. They just simply decided to sell only half of a product. And yes, that does indeed leave a bad taste in the mouth.