Re: "the ability to isolate devices from external connection"
It might not be so trivial if the PC needs to continue to need a LAN connection, even if it's only to a shared printer, whilst other PCs on the premises need an internet connection.
It might not be so trivial if the PC needs to continue to need a LAN connection, even if it's only to a shared printer, whilst other PCs on the premises need an internet connection.