My first ever smartphone (in 2015) was a BQ Aquaris 4.5 Ubuntu Edition that came with Ubuntu Phone pre-installed … a lightweight, 4.5" smartphone … there wasn’t much of an app ecosystem at the time but I didn’t miss it because up to that date I used a dumb phone, and the smartphone allowed me to do eMail and use a browser, which was enough for me.
At some point I accidentially dropped it on a hard floor and it broke, and I was quite unhappy that the company didn’t continue that line :(