is there a rough ETA when we will see the higher limits? π
is there a rough ETA when we will see the higher limits? 
Best practice
Configure a single consumer per queue. This both logically separates your queues, and ensures that errors (failures) in processing messages from one queue do not impact your other queues.

The limit for subrequests a Worker can make is 50 per request on the Bundled usage model or 1,000 per request on the Unbound usage modelRight, but aren't these models deprecated
All users on the Workers Paid plan have been automatically migrated from the Bundled and Unbound usage models to the Standard usage model

ctx.waitUntil() to more cheaply and easily defer those operations asynchronously without holding back the response.
const wait = getDelayInSeconds('14:12', 'Asia/Kolkata');
console.log(wait, 'wait');
await env.YOUR_QUEUE.send({ message: 'okay', date: new Date(), name: 'queue' }, { delaySeconds: wait });error Error: Queue send failed: Internal Server Error
at async Object.handler (file:///Users/nicolethomas/Desktop/NTML/HomeworkHelp/throbbing-salad-88dd/src/index.ts:34:6)
at async jsonError (file:///Users/nicolethomas/Desktop/NTML/HomeworkHelp/throbbing-salad-88dd/node_modules/wrangler/templates/middleware/middleware-miniflare3-json-error.ts:22:10)
at async drainBody (file:///Users/nicolethomas/Desktop/NTML/HomeworkHelp/throbbing-salad-88dd/node_modules/wrangler/templates/middleware/middleware-ensure-req-body-drained.ts:5:10)
[wrangler-UserWorker:err] TypeError: Invalid statusText
at HttpError.toResponse (file:///Users/nicolethomas/Desktop/NTML/HomeworkHelp/throbbing-salad-88dd/node_modules/miniflare/src/workers/shared/router.worker.ts:16:10)
at QueueBrokerObject.fetch (file:///Users/nicolethomas/Desktop/NTML/HomeworkHelp/throbbing-salad-88dd/node_modules/miniflare/src/workers/shared/router.worker.ts:50:14)
at async QueueBrokerObject.fetch (file:///Users/nicolethomas/Desktop/NTML/HomeworkHelp/throbbing-salad-88dd/node_modules/miniflare/src/workers/shared/object.worker.ts:148:11)ctx.waitUntil()