I wasn't worried about the server being shutdown. I was worried about the users using a plain vanilla setup.
When Sony closed their DNAS gateways it wasn't possible to bypass the DNAS checks without altering the discs (patching the checks out). That would've locked out most of our japanese playerbase. Luckily, I was possible to emulate DNAS before the gateways finally disappeared.
So, with the server's software, DNAS emulation and PCSX2 it is technically possible to run Outbreak online forever.