It seems nearly impossible to believe that you don't think they are talking about the same topic. One is discussing a platform, and the other is stating why he won't use that platform. I respectfully disagree that it's not contributing.
The contribution is "this person does not use iOS" which is not particularly helpful in any way, and has resulted in an off-topic metabranch. This is the very definition of not contributing to the discussion.
The contribution is an implied "I think that stance by the manufacturer is ridiculous, and I won't even engage them." It's helpful because it highlights the ridiculousness of the manufacturers system. Sure, it could have been articulated better, but I think it's still contributing.
> which is not particularly helpful in any way, and has resulted in an off-topic metabranch
I would say that your statement has done more to forward this metabranch than the original statement ever did.
