Retractable fountain pens. I could never afford one though.

Fingerprint sensors

I'm old... the internet.

Keyboards, optical scroll, and IR blasters.

Stadia, I had great internet and it worked great.

IR blaster, removable battery, MicroSD slot, analog headphone jack, unlocked bootloader, stylus. The Note 3 was the peak of android phone design. I'm using an S22 Ultra nowadays because of all those features I'm a huge slut for the S-Pen, even to the point of sacrificing all of the others... But I'd love for the rest of those to make a comeback.

My old LG phones had power and volume controls on the back, rather than the side. Great for picking up the phone with either hand, and it was easier to mount in a phone holder (no buttons to accidentally mash).

The ringlight on the bottom of Xperia U.

PIE navigation control

Rear power and volume buttons.

To this day my favorite phone remains the LG v10. It has nice metal rails on the side, a rubber removable back, sd card slot, aux port with a high end dac, wide(er) screen, and buttons on the back of the phones right where your indexed finger would rest when holding it.

Figure print sensor on the button didn't work all that well, but worked better than this shit on screen reader. The buttons being on the back meant your could just grab the phone in anyway with out worrying if you're gonna Power the phone off, turn the vol down, take a screenshot, etc. This also meant getting it knot phone holders was almost never an issue.

That was the closest an android phone got to perfection. After that they started trying to follow tends and phase out the good parts to the point of leaving the Android market entirely.

Democracy in the US.

The internet