You're absolutely right. That said, I think companies also have to consider the saleability of privacy features. How many Echos would you, personally, buy if t

You're absolutely right. That said, I think companies also have to consider the saleability of privacy features. How many Echos would you, personally, buy if they had a mechanical switch? How many people do you think would make the same decision? How does this stack up against the change in failure rates from a physical switch? Again, you're completely correct. It's cheaper to design in privacy features up front. I can see some wrinkles that make the question more subtle, though.