Much better to underpromise and over-deliver ( without bugs) than release early and force your users to do what Apple does to Logic Pro X users at EVERY release; force us to do the install and restore from backup dance while the public bug reports ( complaints) subside after three months. Meanwhile the older( stable ) versions are made unavailable on the App store if you'd like to finally upgrade to a release is finally stable. So if you upgraded too fast ( trusted their tester), you're s**t out of luck. Sorry that your trusted us. WIth VSL, you can trust that much more faster, though true no software is 100% perfect. At least with VSL, the bugs aren't that bad; you don't losing days of productivity fighting bugs, the releases are not that bad.