> They do not do this.
The hardware, firmware and software are a massive all around privacy and security downgrade. It lacks the most basic standard privacy and security protections on mobile. It lacks privacy and security patches not only for firmware but for a lot of the software, since Debian mostly only backports fixes which are assigned a CVE and most security fixes are in fact not assigned a CVE. The model of freezing the software for years isn't a good one.