What’s the deal with the slowness of the volume slider in Windows?

One of the fit and finish features of windows that’s long bugged is the volume control. Why is it when when you click the volume thingy in the system tray it takes a second to popup the volume slider. It’s one dimension of data people, and a handful of pixels.

If you want to adjust the volume coming out of your computer that’s typically something you want to do more or less right away, instead of in a second.

Somehow, in one context, my computer could churn out millions of polygons per frame at 30 frames persecond of high realistic 3d visualized games. But meanwhile, in old 2d windows, with Gigs of untaxed ram whole extra cpu cores in reserve… but WHOA drawing that volume slider on the screen, that’s gotta to take a second.

What gives?