I really think immutable distributions are the future of linux desktop, and maybe distributions that use OCI images, beacause they are a lot easier to work with than say, NixOS for example.
If you want to have your custom bazzite, you just do a "FROM bazzite:<whatever-version-you-want-to-pin" and add stuff you want.
Of course, you loose a bit of the reproducibility, since usually container images do not pin packages (and maybe other reproducibility issues I am not aware of) but it is way easier to work with.