Microsoft's Copilot button is a shining example of the form factor trap.
Who remembers when Siri came out and voice assistants were the future of computing? Samsung built a physical Bixby key into their phones (and went through massive pains to prevent users from disabling it). Microsoft had a dedicated Cortana button ship pinned to Windows 8's dock. Google Assistant was a default Android homescreen.
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https://www.theverge.com/2024/1/4/24023809/microsoft-copilot-key-keyboard-windows-laptops-pcs