There are almost 1400 software packages in Tribblix (in addition to the 500-odd packages in illumos itself). If each piece of software just did 1 release a year, then that's about 4 updates a day, a constant stream of updates.
In practice releases are more frequent on average. I seem to be averaging 10 commits a day to the main build repo. Fortunately most are trivial version bumps, which keeps the effort low.