Indeed fanboyism is a thing, but personally I don't see it in this case. I see arguments accusing a monopolistic app store manager who is enforcing draconian guidelines to abuse it's monopoly, and I see arguments accusing a software vendor with a long history of abuse getting locked out of a plstform it by violating its terms and conditions when attempting to avoid paying for it's use. None of these actions are cheerable.
People in the more general population definitely support Company A or B as if these were sports team, you can in fact find this on the linked article.