[charcircuit]

>People don't seem to use DBus at all outside of Linux.

Because it is a part of freedesktop, a project largely about creating software and specifications for the Linux desktop. Windows has COM. Mac / iOS have XPC. Android has Binder.

> And the fact that someone on Linux in exactly the situation where it should be used wasn't willing to use it suggests that maybe there are significant issues.

It is from cultural and educational issues. It isn't just a coincidence that all operating systems I listed above have a standard IPC mechanism that they use for services.