Update 12/12/23

• Scrolling with trackpads is smooth except on web. Physical mouse wheels match platform physics, but do not have option to override with a smoothing animation.
  • comment: Add option to smoothly animate stepped mouse scroll deltas #32120 (comment)
• What remains here is blocked on Differentiate trackpad from mouse wheels on web #139990, we need to know what is a mouse or trackpad.
  • Once resolved, an adaptation of the Chromium SmoothScroller is in [WIP] Opt-in for smooth pointer scrolling #115314 (full history) or [WIP] Opt-in for smooth pointer scrolling #139392
• There are existing workarounds and packages available
  • https://pub.dev/packages?q=smooth+scroll

Steps to Reproduce

1. Use a desktop embedder, or another platform that allows you to scroll with a mouse's scroll wheel.
2. Scroll any scrollable content (e.g. list demo in Flutter Gallery)
3. Observe how the scroll offset abruptly jumps between scroll notches instead of smoothly transitioning (like Chrome, Firefox, UWP apps, etc.)

Gif example: