It's been running under 'real-world conditions' for years already - do you think no-one runs real-world systems on Fedora, or that Red Hat doesn't run releases in production internally before they go out, or that RH has no customers who test pre-releases?
"Seems to me that's the largest reason it's being pushed"
Nope. I think this impression originally came from Lennart's original post on systemd, years and years ago - http://0pointer.de/blog/projec... - because it starts out talking about boot speed. But even that very first post moves on, in the sections "Keeping Track of Processes" and later, to talk about the really interesting bits of systemd - better service management, and more capable service configuration. As systemd development continued, it's become much more about the latter and much less about boot times - I think that's where Lennart *started* thinking about systemd, but it's really not what systemd is for any more. Red Hat certainly wasn't interested in systemd because it might make servers boot three seconds faster, RH was interested because it can make service management on servers much better.