Use case

If a Slider with allowedInteraction: SliderInteraction.slideOnly is dragged by its handle, the user feedback includes the activation animation (elevation shadow + overlay). If a user taps on the track, there is no visual indication at all, that the Slider is interacted with, until the user starts dragging and sees the Slider move.

Proposal

We find this behavior inconsistent and suggest to drive the same activation animation, once the track is tapped and a dragging would move the handle.
Looking at the code this would even simplify things and remove a bit of the special treatment of slideOnly. I will prepare a PR shortly.