I originally got a Nuphy Air 75 slim mechanical kb to lug around to school, since the iMacs we had there had horrible cheap kbs. It has since surpassed a full sized mechanical as my primary kb. Occasionally on weekend trips, when I wanted to get some stuff done, I've opted to only take the Air 75 instead of a laptop and worked on the phone, either in notes, cloud or termux. Sometimes I've thought about getting a neck holder for the phone to improve ergonomics, but so far the wacky image of using one in public has deterred me from it.