I'm sorry, I fail to see how Android is designed has anything to do with carriers not updating their specific hardware's OS version. My devices are kept up-to-d

I'm sorry, I fail to see how Android is designed has anything to do with carriers not updating their specific hardware's OS version. My devices are kept up-to-date quite nicely, so I guess Android on those is the one that Google designed correctly? That's more about Google's negotiating capabilities with the carriers than how they design software.