That's the e-ink monopoly for you. Though you could probably use a slightly smaller b&w eink display with a second hand raspberry 4 to shave a lot from that number.
1,561 karma · joined May 29, 2013
Reminds me a bit of HMD's KaiOS feature phones but this is apparently Android?
You can see the last release for Starlite Mk IV is from 2024: https://fwupd.org/lvfs/search?value=starlite
These seem to be the SKUs they are building roms for: https://github.com/StarLabsLtd/firmware/tree/capsules/roms
Unfortunately the company stopped releasing firmware updates for it soon after they launched Mk V. I don't know if it can be still built from source for the older devices.