I’m literally using 15.1 right now, and set up 86box las tonight which is unsigned.
You hit a button in the control panel, say ‘fine’, enter your password and it runs.
So no, that’s not how it works and he’s just plain wrong, but it’s Lunduke who is usually wrong when he’s not being a chud, so that’s the usual for him.
They made awesome portable TVs like uh, 30 years ago.