Why has the display control panel pointer truncation bug gone unfixed for long?

For all the hard work they did with driver updates, actual driver management still sucks very badly. Simple concepts such as pinning a driver, something that could be a checkbox, requires edits to the registry or group policy: https://www.tenforums.com/tutorials/146562-prevent-windows-u...

Why has the tray icons still existing despite process being killed bug gone unfixed for decades?

Microsoft does not care or extremely sucks at quality assurance.

Did they not look up the PC manufacturer or model number to verify this hypothesis?