The hidden costs of innovation

from here

 It's been decades and people still haven't realized the error of allowing web content in the body of the email. Companies are still paying the price, including Apple playing a ton of money for vulnerabilities including at least some that would allow an email worm to spread and did allow researchers to compromise Apple's network.

With innovation there invariably comes new opportunities for exploitation, and while sometimes it may be difficult to see it coming, in this case it was entirely predictable.