I’m just dreaming out loud here but I would love for the iPad to allow for a developer workflow similar to Fedora Silverblue. Perhaps not the layered OS images but the containerized sandboxes (toolbox) and the App Store instead of Flathub.
By native I mean:
FROM macos:10.13.2
RUN xcode-build <...>
(I mean the "you're not the target market" understand)