...on LUKS? Are you sure Apple and Google had this guy's local encryption password on hand? Unless of course he reused his password (highly likely), which is the actual flaw in his security
These days, most consumer and commercial machines are running multiple operating systems under Linux below ring 0. Same goes for hardware components with full access to memory and CPU time running their own OSes. Linux is mostly to completely unaware of their existence and can't do much if anything about them.
