Remove Windows modern apps that normally can't be uninstalled

Remove all Modern apps from the system account

Prevent Modern apps to be installed on newly created users with:

Get-AppXProvisionedPackage -online | Remove-AppxProvisionedPackage –online

Remove all Modern apps from your current user account

Get-AppXPackage | Remove-AppxPackage

Remove all Modern apps from a specific user account.

Get-AppXPackage -User <username> | Remove-AppxPackage

Remove Modern apps for all user accounts

Get-AppxPackage -AllUsers | Remove-AppxPackage