As Jan Schaumann wrote in the linked post.. I am not sure either.

    Another approach might be to sit back, have a nice cup
    of zen, and just always pull all updates and then
    update your entire fleet of systems on a weekly basis,
    which, yes, I sure would like to be able to do, but
    reality keeps getting in my way.

    I'm not sure what to do here going forward.

    -Jan