Consequences of bumping Dh compat level for a dh extension

[Lorenzo <plorenzo@disroot.org>]

    Hi all,
    I'd like to check what can happen when i bump the debhelper compat
    level in dh-runit or some other dh extension:
    can i cause problem in a package that build-depends on dh-runit, but
    rely on a older (non compatibile) dh-compat level?
    Other things that I should care to avoid damage on other packages?
    
    Best Regards,
    Lorenzo