[DenseComet]

Workers doesn't really do regions. The code runs in whatever datacenter is closest to the user. It also doesn't have the concept of durable disk. You can use KV, with its trade-off of eventual consistency, or use something like FaunaDB or Firebase, but that means that the request has to wait for the request to the backing service. Its also not super great for long running tasks. The possibility is there with Workers unbound, but I found the pricing structure for it to be a bit opaque.