Earlier quoted context omitted.
There's GrapheneOS
...which is doomed to death whenever Google stops with the security updates for the very specific hardware it runs on. In fairness, IIRC, this is actually the fault of Qualcomm providing, and eventually ceasing to provide, Google with hardware security updates of some sort. The point is that these fun projects to circumvent baked-in awfulness are practically destined to stop working properly due to the nature of the…
edit - found it https://grapheneos.org/faq#legacy-devices
> It cannot do that once device support code like firmware, kernel and vendor code is no longer actively maintained. Even if the community was prepared to take over maintenance of the open source code and to replace the rest, firmware would present a major issue, and the community has never been active or interested enough in device support to consider attempting this