> d-bus services (or other started-as-root daemon-invoked processes) have *none* of
> this security-critical quasi-portable crap visible
They don't have _those_ issues, no. But there are a number of open issues wrt. how d-bus services break the link between the user and the service. The most obvious is that loginuid is lost. I've also yet to see any kind of analysis on DOSing D-Bus. These are all security related problems, they are just less well understood.