The Mill may or not be more secure the other “secure” systems.
However many current commercial OS do NOT implement or use zero or barely any the hardware security protection that is available for free.
If used properly the hardware security, their user and OS software could run faster.
Why? The 100,000+ of lines of no hardware, security software to “provide protection” against bad software, can be totally eliminated.
Sadly every such flawed OS cannot be fixed easily, because their OS is teetering on a historical pile of insecure weak clay. They need to start for scratch and break 95% of the their very expensive code base.
When the Mill gets up and is fully secure from day one that will be fantastic.
MULTICS reborn. I look forward to that day.