Microsoft's Old UI Problem: A Decades-Long Struggle
Microsoft has been dealing with the issue of old UI elements in Windows for decades. In fact, back in 2003, a Microsoft engineer explained why old interfaces stuck around in the OS. At that time, it was because the company deliberately gave users a way to get back to them as a temporary bridge while everyone adjusted.
This approach was taken because corporations with thousands of employees didn't like it when the user interface changed, as it forced them to spend millions of dollars retraining all their employees. By giving people an escape hatch, Microsoft managed that cost responsibly.
However, today we still see legacy UI in Windows 11 not as a courtesy while people adjust, but because Microsoft hasn't finished building whatever is supposed to replace it, and pulling the trigger too early risks breaking something crucial for an enterprise that uses Windows PCs.