Do not treat `Vercel` or `Railway` as zero-ops production infrastructure

Managed hosting can still fail at the account and control-plane layer. Back up env vars, rehearse redeploys, and keep an exit path ready.

• —A Vercel account with 10 projects reportedly lost env vars, secrets, and configs. Treat dashboard state as data that needs backup.
• —Support response took about 2 weeks in the reported incident. Paid convenience does not guarantee incident-speed help.
• —Migrating to Railway consumed days, then the control plane became inaccessible. Provider switching is not a disaster plan by itself.
• —Direct AWS or GCP adds setup pain, but IaC plus secret backups gives more control over recovery paths.