Comment by esbranson

5 months ago

Hopefully it's the base Debian with a thin vendor package set (kernel, u-boot, DTBs, firmware, out-of-tree DKMS, and a Halium-based bridge to HALs) tied together by a meta-package. With apt pinning, upgrades would become normal Debian transactions, security updates would track Debian, and the vendor layer stays limited to an LTS kernel delta, boot bits, and a small Halium shim.

Droidian is effectively what you describe. It's the closest feasible thing to Debian, packaged as a Project Treble GSI (so yes, it needs Halium since it coexists with the device-specific kernel build and the usual AOSP early boot environment).