I'd wait a month or two for edge cases to be worked out and then go for it. If you have a fairly vanilla 7.8 system (i.e. no source compiled stuff on there, ma

I'd wait a month or two for edge cases to be worked out and then go for it. If you have a fairly vanilla 7.8 system (i.e. no source compiled stuff on there, mainly just big name packages etc.) then you should be fine doing it now or in a few days. We updated some simple 7.8 installs to the rc jessie release a month or so ago and everything went fine apart from an obscure bug with monit and inherited umasks. Got around that by manually installing the sid deb of monit. Edit: the main thing you'll want to do is go read up on systemd ahead of upgrading as it's quite a change and there are still some wrinkles ('systemctl daemon-reload' is a new command we've had to use quite a bit).