Yes and that has earned systemd a lot of complaints but most of that isn't really user or service facing. Vs sudo which the user and a lot of applications use.
For what it's worth I actually like the idea that run0 is proposing. It's basically the same idea as what s6-sudo does for the s6 service manager.
My issue is that if this is something they are pushing, instead of making it another "we are doing it this way and breaking with convention" issue, they should go the dbus route and put together a standard with a freestanding reference implementation that's managed by a separate org and then build their tools on that. That way everyone else can go and implement their versions without trying to chase the moving target that is the current systemd implementation.
