As a Roblox developer, it is impossible to read the state from the various lock buttons (Caps Lock, Num Lock etc.)
Currently, a developer has to set the state from an InputBegan call, which can create a desync from the actual button state.
If Roblox were to address this issue, it would make it so we can add caps lock detection to make custom input fields that don’t rely on the currently implemented TextBox Gui object, or a table scroller that uses Scroll Lock.