It’s sad that we ever got to a point where the keyboard can be shown 50% faster, but I’m thrilled to see these pain points addressed. It translates into meaningful, real-world, improvements. The overall reception to iOS 12 is going to be very positive because of it. It speaks volumes that performance is the first section on Apple’s iOS 12 features page.
When something in the UI is slow, even subtly, we notice it; when a lot of things are even a tiny bit slow, it can make using the OS feel tedious. Speed improvements like these go a long way to making iOS feel like a joy to use. I hope this continues to be a priority for every iOS release.
See Also: Designing Fluid Interfaces.