dmix, jack, pipewire
* now maintained at https://gitlab.com/chinstrap/startup
This is not a valid argument, invalidating discussion of merit of thing based on not having personally created incarnation of said thing would remove 99% of debate of FOSS to no ones benefit.
Upstart is decidedly inferior to systemd; the event-based architecture is much harder to understand and apply than the target/dependency architecture of systemd. And systemd is in use in distros ranging from embedded (LibreELEC) to enterprise server, it must be doing _something_ right...
I enjoy the architecture, and hope to continue developing Upstart/startup or at least work with a similar model.