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Something like PostmarketOS is likely a better choice if it is supported for your device.

For people that are not aware: ArchLinuxARM [1] is an unofficial Arch based distro for all kinds of ARM devices.

Using it for my router, firewall and NAS hardware - and can totally recommend it.

postmarketOS has much more active mainline work though

Right, they are at least trying to use current, updatable kernels.

Vendor kernels are a continual security apocalypse that never ends.