https://www.theregister.com/2025/07/17/symbian_forgotten_foss_phone_os/
https://www.theregister.com/2005/12/30/singlechip_rtos_phones/
https://en.wikipedia.org/wiki/List_of_UNISOC_systems_on_chips
new thought: what if Symbian was reprogrammed in C, or even Rust?
Would there be any benefits to compatibility with a linux kernel?