Your smartphone is roughly equal in performance to, if not a better than, the computer you had a decade or so ago. The only reason you can't dock it to a keyboard, mouse, and monitor and use it as a lightweight desktop out of the box is lack of vision, and possibly ulterior motives, on the part of the industry. Don't think of it as a smart phone, think of it as a pocket computer.
If you're willing to do some hard hacks you can turn a Raspberry Pi into a PiPhone:
https://www.raspberrypi.org/piphone-home-made-raspberry-pi-smartphone/
Something you could pull out of your pocket and park on a desktop kiosk with a full sized keyboard, mouse, and screen for those things you just can't do on a swipe screen would be awfully nice.