Sridhar Ananthanarayanan
heart rate monitor - as long as it is approximately correct, I wouldn't call it a gimmick.
AI - gimmick? certainly not.
Bixby - gimmick? Not at all. it is quite useful for those who use it. just because it is an alternative to Google Assistant, and less capable than it in many respects, doesn't make it a gimmick. but hold on, you called AI a gimmick too. so there is logical consistency in your opinion, although incorrect.
animoji - it is a fun feature. don't know how much resources went into developing it. calling it a gimmick is fine.
infinity display - it is the tall aspect ratio of the display that led to the 'infinity' branding. but if you were actually refering to the curves on the sides, I would agree that I am too not too much in its favour because pictures and videos look odd in my opinion.
TouchWiz - not a gimmick either. it is just an os loaded with features. an attempt to include all the features that anyone would ask for. sure, many users will find many features they don't need, but doesn't make it a gimmick.
Heart Rate Monitor-didnt used it much,not that useful and waste of space
Bixby- we already have google assistant, why create another one?
Touchwiz- Almost all of the feature were useless, a lot of double apps (Chrome and samsung internet browser)
AI- We already have those features on older phones ( Overcharging protector as AI on asus phone,seriously?)