What discontinued feature do you miss from phones or other technologies?
For me its the 'Knock Code' that LG had on their phones (I really wish LG still made at least the V series phones)
Basically there was a four-square area and you set up a sequence of where you would tap to unlock the phone. That set of squares was only shown when you set up the code
Then, to unlock your phone, you would tap those areas in the sequence you set up (even with the screen off).
Fingerprint readers are nice, but I really do miss the knock code
Edit: did find this article with a way to do the knock code, but if done wrong, could brick your phone I guess.
Plus, article is from 2014. When I looked at XDA's info on it (they also being the developers) it looks like development on it is over, but individual modules may or may not still be supported by their devs
Yet another of Google's discontinued pet projects with tons of potential but that that they quickly lost interest in, my trusty (now officially unsupported) Pixel 4XL has a Soli Radar sensor that I'm going to miss when I finally break down and buy another phone.
It is so nice to be able to just wave generally in the direction of my phone to do stuff. I use it all the time when I'm driving to skip songs, or repeat the last song, or pause the music, etc. without taking my eyes off the road. It really is a shame to me that they threw a bunch of money at a legitimately cool project like that, and then seemingly just abandoned it entirely.