One thing that's notable about devices that "only run free software" is that they actually don't, since people use web browsers on them, and the websites are no

One thing that's notable about devices that "only run free software" is that they actually don't, since people use web browsers on them, and the websites are not free software. You'd also have to never talk to another person with them, since other people are capable of manipulating your emotional state and can't be audited.