I've only owned 2 smartphones in my life and I'm never going back to using one. I got my first one during my 2nd year of college (I don't remember what brand or model it was), and it crapped out about a year later. One memory I have of it was this guy I knew at the time called it "ghetto-looking" because I had to secure the cheap plastic case with Scotch tape. The second one I had was a rugged smartphone called the Plum Gator 3. While I love rugged devices because they're made to take a beating, I couldn't root it and put something like Ubuntu Touch on it because the bootloader wasn't available. Aside from being forced to run Stock Android on it, it wasn't too bad of a phone. Then the door to the battery compartment broke and I had to ditch it, which then led to me getting the piece of crap flip phone, the Alcatel GoFlip3. Now I have a rugged flip phone called the Kyocera DuraXV Extreme, which has been FAR better than the GF3.
Why I'll never get another smartphone is because:
1) Depending on what phone you get, they're often too expensive
2) They're actually not smart "phones", they're pocket PCs. You don't need all of these bells and whistles on something that was intended to perform basic functions.
3) The abundance of apps (especially the proprietary ones) makes them addicting. I thankfully never got addicted to the ones I had, but its annoying to see some of my coworkers be that way. Because they're your age, they grew up with that behavior, but it would've been nice if their parents didn't pacify them with technology.
4) The abundance of apps also makes people consume more data, which then makes their phone bill go up. Because lockdowns have ruined global economies, I'd like to imagine parents aren't going to be so lenient when it comes to their kids phone bills, and will either make them downgrade to a non-smartphone, or make them pay their own bills (which could then lead to them getting a non-smartphone on their own). Then again, I've seen my boss' mom pull out her smartphone and tablet for her grandkids to play games on.
5) Tactile button phones make the screen smaller, but that's a minor inconvenience compared to how sensitive touchscreens can be at times