I still don't get the practical advantage of this. As someone said below he/she wrote one and running similar setup in production. Just why? Typicall you access

I still don't get the practical advantage of this. As someone said below he/she wrote one and running similar setup in production. Just why? Typicall you access internal stuff over intranet over VPN. How is running both 22 and 443 on 443 in this multiplexing way help security?