Resiliency: At one company I was at, we had development all over the world and often we would have a connection go down to the headquarters where we had the VPNs. This caused the remote site, sometimes with 100s of developers, to come to a halt isolating the office. In order to keep development going, I dropped a VPN and a small VIP relay server in the office. Because VIP is cloud based, as long as the site had an Internet connection, developers could still get in and work.