Ryan,
As I said, this is a holy war and while I try to understand your reasons, personally I don't understand those guys that are looking for the newest and latest (not necessarily in the software world, but in the real world as well) and expect that all others must leave everything and provide immediate compatibility with their new toy.
As for the software... I am not paying much attention to this and not going to start another discussion, but I don't remember severe backward compatibility problems with Windows and its applications. When the new security enhancement is released, you may use it in the new versions of your software, but it did not break the existing old functionality.
As for the rate of Chrome/FireFox updates... Sometimes it makes me think that the guys there don't involve security and other experts in the process. Otherwise, I can hardly explain to myself what new functionality required 30+ versions of their software which is often incompatible with one another.
The same with the customers management. Again, nobody is wondered that car manufactures do not allow unauthorized modifications to their cars. And I think that if I come to some car dealer and will require to install some equipment, even from the same manufacturer, but that was not fully tested, they will do this. I think that they will not do this even if I say that otherwise I will buy a car of another brand. Likewise, personally I, cannot understand those software users who install browsers that are not supported by the given software and blame software vendor. My opinion is that these users must blame browser's vendor for providing them with the version that is not backward compatible and themselves because they allow browser's vendor to make unattended changes to their systems without clear previous warning. All at all, if they allow such things, why they don't allow some software robot to sign their bank documents according to the sole decision of this robot?
P.S. I think that I will stop here, because my opinion will not change and I don't want this thread to turn into a mess. And yes, I also expect that SmartBear support new browsers when they are released, but not immediately but within a reasonable time period that is required to do their part of work right.