You still have to defend against cold boot attacks or very sophisticated hardware implants: https://www.bloomberg.com/news/features/2018-10-04/the-big-hack-how

You still have to defend against cold boot attacks or very sophisticated hardware implants: https://www.bloomberg.com/news/features/2018-10-04/the-big-hack-how-china-used-a-tiny-chip-to-infiltrate-america-s-top-companies?leadSource=uverify%20wall https://www.bloomberg.com/news/features/2018-10-04/the-big-h...