3D Touch was one of my favorite features on iPhone. When they took it away, it just didn't feel the same. Now I'm primarily a Pixel user

I thought I missed actually having buttons for things, but recently I found out that no, touch screens are usually superior.

I have a friend that will only use a flip phone physical keyboard + smart phone features. I don't really care and miss nothing.

I don't actually miss much, but I also don't really use my phone a whole lot. I have a smartphone, but it's pretty close to factory settings. I don't really install apps outside Line, I very rarely make calls on it. It probably gets used for transit directions/maps, mail, and Line 90% of the time.

Maybe not a specific feature, but I do dislike the general trend towards large and larger phones/screens. I must prefer the smaller phones we used to have; I know Apple had their smaller phone lines recently but I think they didn't do particularly well.

Fingerprint readers are a bad idea for a variety of reasons. So this does seem like a loss! What a cool concept.

Aux ports are nice for versatility, even if I was already using wireless earphones. Along with being able to listen to FM right on your phone. It's features I don't use often, but occasionally. I wish the USB-C connector had the option with a clip. IR-blasters were useful and much fun. I never even used the actual remote to manage my LED strip.

I never realized notification lights just kind of stopped existing. But I don't miss them in light of always on displays. Under screen finger print readers is basically a dream come true. Having multiple cameras is nice. OLED screen is an absolute godsend. Overall I'm not unhappy.

Since a lot of the other ones have been said already I'll do one that hasn't been said yet:

3D Touch