&gt;So there is no stable interface to even implement and there is no commitment that these &quot;interfaces&quot; will not change at any point in time.<p>Isn&#x27;t this what the systemd &#x27;Interface Stability Promise&#x27; does as listed here ?<p><a href="http:&#x2F;&#x2F;www.freedesktop.org&#x2F;wiki&#x2F;Software&#x2F;systemd&#x2F;InterfacePortabilityAndStabilityChart&#x2F;" rel="nofollow">http:&#x2F;&#x2F;www.freedesktop.org&#x2F;wiki&#x2F;Software&#x2F;systemd&#x2F;InterfacePo...</a><p>Judging by this chart, ~99% of the intefaces are stable.