I think that the parent comment is actually supporting your point. It does not need to be Turing Complete to be extremely useful. Conversely, a model of computa

I think that the parent comment is actually supporting your point. It does not need to be Turing Complete to be extremely useful. Conversely, a model of computation (CSS) could be Turing Complete (with infinite memory, etc.) and lack arbitrary access the host filesystem (e.g., it only allows to read specific read-only files), thus being useless.