The big problem with the way ostree works is that installing things has side effects. Every item you install with ostree makes all future items slower to install, including regular os updates. This is a significant flaw in the way they designed it and really makes immutable oses less attractive.
It isn’t, though. Package layering modifies the install itself. See: https://docs.fedoraproject.org/en-US/fedora-silverblue/getting-started/#_flatpak_command_line
The big problem with the way ostree works is that installing things has side effects. Every item you install with ostree makes all future items slower to install, including regular os updates. This is a significant flaw in the way they designed it and really makes immutable oses less attractive.