Not sure it tells all that much about 'how the OS works'. This is a historical abstraction that happened to look how it looks today with all its numerous warts

Not sure it tells all that much about 'how the OS works'. This is a historical abstraction that happened to look how it looks today with all its numerous warts and shortcomings. We can easily imagine it done a better way - for all the criticism of Windows, PowerShell gives a glimpse into this hypothetical future.