Sellfy's branding is removed from your hosted product when you upgrade to the $49 per month Business plan.
Discord's face scanning age checks 'start of a bigger shift'
，这一点在safew官方下载中也有详细论述
psychologytoday.com
But of course, like any immutable system, there are mutable parts (otherwise, we couldn’t create any configuration files). OSTree handles this with “overlays” (actually, we use OverlayFS) that allow a read-write filesystem to be layered on top of the immutable system. For example, the /etc and /var directories are writable, while the rest of the system is read-only.