Apple has a very bad reputation when it comes to taking over products like this. TestFlight is the prime example. TestFlight basically disappeared for a year until coming back as a more limited and slower Apple branded service. And by slow I mostly mean, it takes 6 months for bugs to be fixed or for exciting things to happen. Agility and innovation of a startup basically ends when Apple assimilates a service.
From the blog posting it is also not very clear what will happen to existing iOS customers. Can I upgrade my plan? Can I expect service? Will the existing infrastructure be maintained?
I'm excited about what this could mean in terms of Xcode and Xcode Server improvements. Or maybe even a hosted CI service at Apple. But that it all long term 'maybe'.
As for a shift in startup culture, what is more tempting than 5 to 10 years of hard work into billion dollar exits? Local governments could start offering tax incentives that build over time—or more aggressively, have steep disincentives on corporate takeovers.
Continuous deployment is a good example where this doesn't hold. You roll out things more quickly... and you experience less issues!
When issues happen, the cause is easier to isolate. After all, you only had one day's worth of changes (and not one year's worth). The previous state is more knowable. Testing is more concentrated.
Apple's new OS releases are the opposite of this. They release 30 different major changes at once, they all collide, and we end up just assuming that .0 releases will be broken.
In an alternate universe, Apple just releases updates to parts of software when it's ready. They don't pin Safari to the OS (because there's not much of a technical reason to). They could pinpoint _when_ "Month 13" started showing up everywhere beyond "when everyone downloaded that 7 gig update".
It takes some effort and tooling, but if you're expecting to make changes, a lot of times making the changes piecemeal will mean that post-release stability will increase in many cases.
Look at air transportation. It was a series of fairly novel and innovative programs that took place to make a new transportation industry the safest by a mile. It was some serious hard work and innovation to make air transportation the safest and most stable way to travel.
You can purchases strata title triple A class office space in Vancouver for less than that.