Discussions about specific technical decisions Apple has made and how they impact the Swift development experience are undoubtedly on-topic for these forums (though they may not always receive the most satisfactory response). Indeed, the topic of the inflexibility of OS upgrades has come up before and I think there's been valuable points raised.
I agree with @itaiferber, though, that generalized grievances and speculation about Apple's company priorities do not seem like a particularly productive topic of discussion.