Not a gimmick. It was great to control TVs, air conditioners, audio receivers, and even electronics projects using something like an arduino and an IR sensor. Such a shame that our smartphones have been stripped of so many features as companies have run out of good ideas to increase demand.
Not so much a gimmick, as much as something that seemingly went extinct that I miss: rear fingerprint sensors. I loved them on my Nexus/Pixels, and the in-screen one on my 6a is way less consistent and convenient.
Also it flashbangs me when I try to unlock my phone at night.
Still using it myself, in fact! LMT is still going strong, though I imagine it would work better if I were able to root the phone I’m using at the moment.
Easily notification light. People always say “oh, it’s totally obsolete with always on displays”. But with a notification light I could focus on other stuff and the blinking light got my attention better. With the AOD, I always catch myself glancing at my phone. Also, the light’s color clearly indicated which app caused the notification. I had White for calls, Green for Whatsapp, Yellow for the ebay app, Red for GMail and so on. “You can do all that with an OLED screen! It only lights up the pixels that-” Can you, though? All apps that I tried were utter garbage. Buggy performance, very battery hungry and very cumbersome to configure. I don’t know if custom firmwares actually have that feature in a usable state nowadays, as I cannot root my phone anymore without losing core functionalities like online banking.
Yeah, everything tends to go to shit with time. I miss my Galaxy S2.