Is it possible to completely abandon the use of DispatchWorkItem in asynchronous task implementation?

Yes, a complete refusal to use DispatchWorkItem is possible when implementing asynchronous tasks in iOS, as it is just one of the tools for managing tasks in GCD (Grand Central Dispatch).

You can directly use DispatchQueue.async functions to run asynchronous tasks without creating a DispatchWorkItem. For example:

DispatchQueue.global().async {
    // Asynchronous task
    print("Running in a background thread")
}

DispatchWorkItem is useful when you need the ability to cancel a task, add completion notifications, or group tasks, but if such requirements are not present, it can be omitted.

Other approaches for asynchronous execution include using OperationQueue or modern async/await in Swift.