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By Jason Snell for Tom's Guide
That blue bubble. Apple works to tie its customers to its ecosystem in many different ways, but there’s no better symbol of the power of platform lock-in than the blue-bubble users of Apple’s Messages app see when they’re talking to a fellow member of the Apple tribe. On Android or a feature phone? You get a green bubble. It’s just not as good.
And yet for all the importance the Messages app has to Apple’s platform, it could be a lot better than it is today. Over the past few years, Apple has introduced features that haven’t gone anywhere, while leaving some other potentially powerful features unaddressed.