It'd be great to have Oak feature parity with Hono so I can use it!
Specifically,
Cloudflare Worker environment and execution context are not currently exposed to middleware.
This means you're not able to access things like environment variables and bindings.
Hono supports this quite well https://hono.dev/docs/getting-started/cloudflare-workers#bindings
Hono also supports things like Cloudflare Queues which has a nice API. https://hono.dev/examples/cloudflare-queue