I'm a developer and I definitely want that stuff some of the time. On platforms that can handle it, absolutely. I love all the animations in macOS and I always have. GNOME and Windows are nice but they don't feel like home in the same way, they don't have sophisticated and fluid animations.

They need to be performant and they need to improve the usability of the system, not reduce it. That's the criteria. It's often not achievable with the web, though people try.