Congrats to the Debian team which looks like a fine release that will carry us for the next 5-years. Although I do not directly use Debian anymore its worth calling out that they have been a influence, driver and overall force of nature in the Linux distro ecosystem.
For those who dont know…all Debian releases are code-named after Toy Story characters. Bookworm being a minor character in Toy Story 3.
With macOS really only the very core of the system is immutable—the kernel, boot loader, stuff like that. The rest is “normal” BSD. And unlike Silverblue, there isn’t really a file system layering.
Also you can turn off system integrity protection with macOS and it behaves like any other BSD system. The whole file system becomes read/write but otherwise keeps working as before.