That’s why Plasma is built to support different shells, optimized for different form factors which allows to do this stuff like the Netbook shell in the past or now Plasma Bigscreen for TVs or Plasma Mobile for smartphones.

zram did wonders back then to the performance/usability of Palm/HP webOS devices, especially the 1st Pre.

If you calculate what you’d spend on regular phones with a 2-3 year lifetime instead of a single one for 8 years (even including a few repairs), it might be actually cheap.