TailsOS | OPSEC ready OS | Easy plug and play OS

Tails, or "The Amnesic Incognito Live System," is a security-focused Debian-based Linux distribution aimed at protecting the online privacy and anonymity of its users. With its focus on privacy and anonymity, Tails is aimed at helping journalists, activists, and individuals living in repressive regimes to communicate securely and avoid surveillance.
read this short description below and you ll learn how this boot from usb only OS is good for OPSEC reasons.
Bear in mind its Linux based