I think "great" implies that it is clearly better than anything you'd compare it to. Messi is great at soccer. The McLaren F1 was a great car. The iPhone 6

I think "great" implies that it is clearly better than anything you'd compare it to. Messi is great at soccer. The McLaren F1 was a great car. The iPhone 6s was merely a flagship phone that was directly comparable to other flagship phones- you didn't see people abandoning their flagship Androids for a 6s. Compare the legacy of the 6s to the iPhone 3G, which has a much better claim to being great. There was no real competition for it. Even if you weren't an Apple fan, BlackBerry was clearly outclassed and dying, PalmPilots were already dead, and Android was just getting started.