Linking a table without computed columns makes little sense, maintaining several environments requires to methodically duplicate each edit made in one apps on other apps… ultimately lead to discrepancies.
Beside the obvious practicity, syncing computed columns between apps would be a workaround for the one-designer-only limitation, as several developers could simultaneously work on different apps with difference use cases for the same data (ex: live app / backoffice / third-parties-access / client-admin).
And having several apps using the same data would enable teams to have several detail screens and edit screens for the same table, again saving a ton of time in tweaking the app to show different components for different users on the same detail/edit screen.