As someone who's been in a position like this before, I suspect the author is angry at the manufacturers and feels they're not being honest by not providing proper specs. It's hard to spec out a project when no one will tell you exactly what their parts can do. It's like if you were trying to buy a light truck for work and intsead of telling you how much weight it could pull or how often maintenance would be needed, the manufacturer refused to say anything more than "it can tow a speedboat" and "it requires infrequent maintenance."
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