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Yes, cryptosteel it total overkill. I can not remember having heard of a single case where the only copy of a crypto seed survived a burned house only because it was kept on crypto steel. It’s just a theoretical risk that almost never materializes. But it’s always a good idea to keep the seed separate from the hard ware wallet. This case if you lose either of the two, you can still access your funds.
I got crypto steel only because it looks cool, but yeah, not really needed. Much more important to keep it in a truly secure place where noone but you can access it.