What is the purpose of using outputToObservable?

I understand that it converts an output or output reference into an observable. But where would we actually use this? What is the benefit of converting an output reference or output into an observable? There must be some use cases for it.

public countObservable$:Observable<number> = of(89);
public count:OutputRef<number> = outputFromObservable(this.countObservable$);

public ngOnInit(): void {
outputToObservable(this.count).subscribe(value => {
console.log(value)
})

}

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