[This note may belong on the "Dataentry" topic... If so, let's move the discussion there.]
I am not sure of the value of this "Installation method" field.
First off, I don't know how we would populate it. It wouldn't make sense for us to review all the Device Pages from OpenWrt: despite the fact that it would be a lot of work, we'd simply propagate any (mis)information contained there (because we don't have personal experience with all devices).
Second, what will the reader do differently based on the setting of this field? Would they choose not to use the device?
So I would choose not to retain this field. Thanks.