To create the best command-line experience, PowerShell is now the command shell for File Explorer. It replaces Command Prompt (cmd.exe) in the Windows Logo Key + X menu, in File Explorer's File menu, and in the context menu that appears when you shift-right-click the whitespace in File Explorer. You can still enter cmd (or powershell) in File Explorer's address bar to launch the command shell.
For those who prefer using Command Prompt, you can opt out of the Windows Logo Key + X change by opening Settings > Personalization > Taskbar, and turning off, Replace Command Prompt with Windows PowerShell in the menu when I right-click the start button or press Windows key+X.