But there are definitely some dangers to having a system that delivers the latest and greatest versions of every package on an ongoing basis. Because these packages are being released to the public at a more rapid rate, that means less time for testing.
Even with larger, less frequent releases, major bugs can creep in at the last second before a launch. If you’ve been around the Linux world for a few years, you’ve seen this first-hand. Just do a quick Google search for "ubuntu update breaks X11," and you’ll see what I mean. This isn’t, in any way, a knock against the Ubuntu team (who do an absolutely stellar job). It’s just the reality of the software world. Bugs happen.
But the more often you release, the more chances there are for bugs to be released.