on (#6H4QV)
There's been nothing new on the BUS1 front this year for capability-based IPC within the Linux kernel... In fact, the BUS1 out-of-tree kernel module has gone untouched for years now. But out of the BUS1 project has been Dbus-Broker for a high performance D-Bus message broker in user-space that doesn't break existing D-Bus compatibility. Out today is the newest version of that project closely tied to systemd developers...