Apple has consistently balanced beauty and function, from their hardware to stores to product packaging. They must have an army of experienced UX designers and well thought out user testing processes. Given all that, how in the world did this liquid glass idea even get past the preliminary mockup stage? Were/are they simply betting that the cool factor of the glass effect will outweigh the usability issues? And that Windows Vista’s glass UI went out of style simply because it wasn’t realistic enough?